Written by: Learning Objectives
This article explains how website migrations, redesigns, platform changes, and domain rebrands can destroy SEO performance if redirects and migration planning are ignored. It covers 301 redirects, URL mapping, Search Console audits, migration checklists, common migration mistakes, and real-world case studies showing how businesses preserved organic traffic during website rebuilds.
By the end of this module, you will be able to:
- Identify which pages on your current website are generating organic traffic – before you touch anything.
- Understand why 404 errors after a website rebuild destroy years of earned Google trust.
- Set up a proper 301 redirect map that preserves your traffic and keyword rankings.
- Hold your web designer or developer accountable for basic SEO hygiene during a migration.
- Audit your new website post-launch using free tools to catch and fix problems fast.
Key Concepts
- Website Migration – Moving a website from one platform, domain, or URL structure to another. This includes platform changes (WordPress to Shopify, Squarespace to WordPress), redesigns that alter page URLs, and full domain rebrands. Australian search volume: 150/month. Difficulty: low. CPC: not widely bid – informational intent dominates.
- 301 Redirect – A permanent redirect that tells Google: “This page has moved. Send its authority and traffic to this new URL.” Think of it like Australia Post updating a mailing address – the mail still arrives at the right door. Without it, the mail gets returned. Australian search volume: 50/month. Difficulty: 28/100. CPC: $0.70.
- 404 Error – What a user (and Google) sees when a page no longer exists. A 404 is a dead end. It tells Google this content has vanished, and Google removes it from the index – taking its traffic with it.
- Crawl Index – Google’s live database of your website’s pages. Pages earn their place in the index over time through consistent user signals: clicks, time-on-page, scroll depth, return visits. Deleting pages wipes that earned trust overnight.
- Permalink Structure – The URL format your website platform uses by default. WordPress uses clean paths (
/service-name). Shopify forces category prefixes (/pages/service-nameor/collections/service-name). Changing platform = changing URLs = new pages to Google unless redirected. - Website Migration Checklist – A documented list of every old URL and its corresponding new URL, used to implement redirects before or immediately after launch. Australian search volume: 200/month. Difficulty: 12/100. CPC: $1.20 – this is the standout keyword opportunity in this topic area.
Why This Matters More Than You Think
Let me be direct about something: I get called in to fix this regularly. A business owner spends $30,000 to $80,000 on a new website. It looks great. The design agency is proud. Everyone celebrates the launch.
Then month two arrives. Enquiry volume drops. Calls slow down. By month three, the owner is asking: “What happened?”
What happened is that Google had been quietly sending traffic to pages that no longer exist. Pages that weren’t glamorous, weren’t heavily promoted, and weren’t the homepage – but were quietly ranking for specific, high-intent searches. A service page. An old blog post. A product category URL. That traffic was real. Those leads were real.
And now they’re hitting a 404 page, and Google has cleaned them out of the index.
If your business has been online for more than 12 months, you are almost certainly getting organic traffic you don’t even know about. If it’s been three to five years and your site has more than 50 pages – you have real SEO equity sitting there, regardless of whether you’ve ever paid for SEO.
Blowing it up without a plan is like renovating your café in Fitzroy – knocking out the shopfront, changing the signage, and removing the A-frame out front – without telling anyone you’re still open. Your regulars won’t find you. New customers won’t find you. And by the time you get the new sign up, you’ve lost three months of revenue.
Real-World Case Studies
Case Study 1: Bayside Accommodation – Squarespace to WordPress Migration – Frankston, VIC
The Challenge: A boutique accommodation business in Frankston had operated their Squarespace site for four years. They decided to move to WordPress for more flexibility. The new site had around 80 pages. The old site had over 400 pages indexed in Google – including tag pages, category archives, and seasonal landing pages that had accumulated traffic over time.
When I was brought in, the question I asked first was: “What’s the redirect plan?” The answer from the web team and the client was silence. No plan existed.
The Strategy: We paused the migration deadline by six weeks. Using Google Search Console, we exported every indexed URL from the old Squarespace site. We cross-referenced against Google Analytics to find the top 60 pages by organic sessions. Those 60 pages became the priority redirect list – mapped to their closest equivalent on the new WordPress site.
For pages with no meaningful equivalent, we created new content stubs on the WordPress site first, then redirected. For tag and category pages that had no real traffic, we let them resolve as 404s – no value in redirecting noise.
The Results: Three months post-launch, organic traffic was down 12% from its pre-migration peak – a manageable dip that recovered fully by month five. Compared to the typical unmanaged migration – which can see 40-70% traffic loss sustained over 12+ months – this was a controlled transition.
The Lesson: The number of indexed pages versus live pages is your first red flag. A gap of more than 30% between old and new page counts means you need a redirect plan before a single line of code goes live on the new site.
Industry Application: Accommodation, tourism, and hospitality businesses often accumulate destination-specific landing pages over years – “pet-friendly accommodation Mornington Peninsula,” “last-minute deals Phillip Island.” These pages carry specific search intent. Losing them without a redirect is like pulling your Yellow Pages listing mid-season.
Case Study 2: Skin & Laser Clinic – WordPress to Shopify – Paddington, NSW
The Challenge: A cosmetic clinic in Paddington, Sydney was switching from WordPress to Shopify to make inventory and retail product management easier. The issue: most of their revenue came from in-clinic services, not product sales. So Shopify’s URL structure – which defaults to /collections/ and /pages/ prefixes – was going to change every single service page URL.
When I audited the old WordPress site, I found it was receiving 800-900 organic visitors per month. One service page alone – a carbon peel treatment – was getting 300-400 visitors per month. High commercial intent. Real bookings. And there was no equivalent page planned on the Shopify site.
The Strategy: I flagged the carbon peel page immediately. The new Shopify site had a vaguely similar page, but it had been rewritten by dumping the old content into an AI tool, stripping all the clinical detail, and letting Shopify’s theme place a generic “Buy Now” H1 tag at the top – which overrode any SEO intent signal. We rebuilt that page properly: a descriptive H1, treatment-specific copy, a clear call to action for bookings. We also set up a 301 redirect from the old WordPress URL to the new Shopify URL.
For the remaining service pages, we audited each one against the old Google Search Console data. Any page with more than 20 organic clicks in the past 90 days got a dedicated redirect and a content review.
The Results: Six months post-launch, the carbon peel page was back in the top 5 for its primary treatment keywords. Bookings from organic search held steady. The overall migration cost around $2,800 AUD in additional SEO work – a fraction of what a year of lost bookings would have cost.
The Lesson: Shopify is a fine platform for product-based businesses. For service businesses, you’re accepting a URL structure downgrade that costs you SEO cleanliness. If you go ahead with Shopify, at minimum audit your top-performing pages and rebuild each one with intentional headings – not theme defaults.
Industry Application: Cosmetic clinics, allied health practices, and beauty salons often have long-tail service pages that rank quietly and drive consistent bookings. A dermal filler page, a laser hair removal page, a teeth whitening page – each of these earns its own traffic. Treat them as individual assets when migrating.
Case Study 3: Trades Business Rebrand – Full Domain Change – Blackburn, VIC
The Challenge: A residential electrical business in Blackburn was rebranding completely – new business name, new domain, new website. This is the most complex migration scenario: not just a platform change, but a full domain swap. The old domain had five years of history, 120 indexed pages, and around 600 organic visitors per month, mostly from suburb-specific service pages (“electrician Blackburn,” “switchboard upgrade Mitcham”).
The Strategy: My recommendation: don’t rush. Launch the new domain and new website independently first. Get the functionality right. Let the new site get crawled. Then, over a 60-90 day window, implement page-by-page 301 redirects from the old domain to the new one – starting with the highest-traffic pages.
We also built a parallel content structure on the new site first, so every redirect had somewhere meaningful to land. Redirecting “electrician Blackburn” on the old site to a new homepage would have been useless. Instead, we built a matching suburb page on the new site and redirected like-for-like.
The Results: The phased approach meant traffic dipped 25% in the first 60 days as Google processed the new domain – expected and communicated to the client upfront. By month six, organic traffic on the new domain had exceeded the old domain’s peak. The client kept their suburb page rankings intact for 14 of the 17 key service locations they operated in.
The Lesson: A domain rebrand is not a web design problem. It’s a business continuity problem. Treat it like moving premises – you don’t change your address without forwarding your mail.
Industry Application: Trades businesses – electricians, plumbers, builders, landscapers – typically rank well for suburb-specific searches. These hyper-local pages are the most commercially valuable pages on the site. A page ranking for “plumber Essendon” drives more revenue than the homepage. Protect those pages first.
Implementation Guide
Step 1: Audit What You Have Before Touching Anything
Before any conversation with a designer or developer, open Google Search Console and pull your top pages by organic clicks over the last 12 months. Export that list. That is your SEO asset register – treat it like your business equipment list.
What it looks like: Log into Google Search Console → Go to “Performance” → Click “Pages” tab → Sort by clicks (descending) → Export to a spreadsheet.
Pro tip: Cross-reference this with Google Analytics to see which pages have the highest conversion rate, not just the most traffic. A page with 80 visits per month and a 15% enquiry rate is worth more than a page with 500 visits and a 0.5% rate.
Step 2: Build Your Redirect Map
For every page in your export with more than 10 organic clicks in the past 90 days, you need a destination on the new site. Create a simple spreadsheet with two columns: Old URL | New URL.
What it looks like:
| Old URL | New URL |
|---|---|
/services/laser-treatments |
/treatments/laser-skin-resurfacing |
/blog/carbon-peel-benefits |
/blog/what-is-a-carbon-peel |
/contact-us |
/contact |
Pro tip: If the new site doesn’t have an equivalent page yet – build one first. A redirect to a relevant page is worth doing. A redirect to the homepage is barely worth the effort.
Step 3: Ask Your Developer the Right Question
When you sit down with whoever is building your new site, ask them one specific question: “How are you handling 301 redirects from every old URL to its new equivalent?”
If the answer is “That’s an SEO thing,” or “We’ll handle it after launch,” or silence – you have a problem. Basic 301 redirects are a standard part of any professional website migration. It’s not a specialist skill. It is, however, frequently skipped.
What it looks like: A professional developer will either have a redirect plugin (on WordPress), a redirect app (on Shopify), or will implement redirects in the .htaccess file or server configuration. Ask to see the redirect list before go-live.
Pro tip: Get the redirect plan in writing, in the project scope. Make it a deliverable with a checkbox, not a verbal agreement.
Step 4: Do a Post-Launch Audit Within 48 Hours
As soon as the new site goes live, do two things:
- Go to Google and type:
site:yourwebsite.com.au– scroll through the results and click a selection of pages. Make sure they land on real pages, not 404s. - Log into Google Search Console → Go to “Pages” → Look for the “Not Found (404)” report. Fix everything on that list within the first week.
What it looks like: You’ll see a list of URLs Google tried to crawl and hit a dead end on. Each one is a lost ranking opportunity.
Pro tip: If the site is large (100+ pages), use Screaming Frog (free up to 500 URLs) to crawl your old URL list and check every redirect is resolving correctly before Google does it for you.
Step 5: Monitor Search Console Weekly for the First 90 Days
The first 90 days after a migration is the critical window. Google is re-evaluating everything. Rankings will fluctuate. Some pages will temporarily drop. If you have redirects in place, most will recover. If you don’t – the drops will be permanent.
What it looks like: Set a recurring weekly calendar reminder to check Search Console. Look at total impressions and clicks versus your pre-migration baseline. A 10-20% dip is normal. A 50%+ dip in the first 30 days is a red flag that needs immediate investigation.
Pro tip: Take a screenshot of your Search Console performance graph on the day of launch. You’ll want that baseline when explaining the traffic movement to stakeholders later.
Common Pitfalls & Solutions
| Pitfall | Fix | Prevention |
|---|---|---|
| No redirects implemented at all | Immediately build and implement a redirect map for your top 50 pages | Make redirects a line item in your web project brief |
| All old URLs redirected to homepage | Remove homepage redirects; build matching pages and redirect like-for-like | Review each redirect destination before go-live |
| Platform switch changes all URLs (e.g. Shopify prefix) | Map old clean URLs to new prefixed URLs; 301 each individually | Confirm URL structure with developer before build starts |
| New page content rewritten by AI with no SEO structure | Rewrite H1, H2s and meta titles with target keywords | Keep original page content as a reference doc during migration |
| Shopify theme places H1 in footer or nav | Edit theme code or use SEO app to override default heading placement | Audit heading structure (H1-H3) on every page before launch |
| 404 report not monitored post-launch | Set up weekly Search Console review; fix 404s within 7 days | Schedule a post-launch audit as part of the project plan |
| Domain rebrand done in one day | Redirect old domain in phases over 60-90 days, starting with highest-traffic pages | Treat domain changes as a 3-6 month project, not a launch event |
Practical Exercises
Quick Win (5 mins): Right now, open Google Search Console for your website. Go to Performance → Pages. Look at the top 10 pages by clicks. Are any of these pages that would change URL if you rebuilt your site? Write them down. That list is your starting point for any future migration.
Deep Dive (30 mins): Export your full page list from Google Search Console. Export your Google Analytics top pages. Merge them into one spreadsheet. Flag every page with more than 10 organic clicks in the past 90 days. For each one, write down: what keyword is it ranking for? What is the equivalent page on the new site? Is the content similar enough? This is your migration risk register.
Real Business Application:
- Trades (electrician, plumber, builder): Your suburb service pages are the ones to protect. Map every “electrician [suburb]” or “plumber [suburb]” page individually. These drive direct enquiries.
- Medical/Dental: Each treatment page is a patient acquisition asset. A dental implants page ranking in Parramatta is worth protecting the same way you’d protect a specialist referral relationship.
- Retail/Hospitality: Your product category pages and seasonal landing pages carry traffic. An “engagement rings Melbourne” page or “Christmas gift boxes” category has earned trust. Don’t let a platform switch erase it.
- Professional Services: Blog posts and service pages that answer specific questions – “do I need a financial planner,” “how much does conveyancing cost in Victoria” – rank quietly and drive high-intent leads. Audit before you migrate.
SEO Keyword Opportunities (Ahrefs AU Data)
If you’re a web agency, SEO consultant, or digital marketing business producing content around website migration, these are the terms worth targeting in the Australian market:
| Keyword | Monthly Volume (AU) | Difficulty | CPC |
|---|---|---|---|
| website migration checklist | 200 | 12/100 | $1.20 |
| website migration SEO | 150 | – | – |
| website redesign SEO | 70 | – | $5.00 |
| 301 redirect SEO | 50 | 28/100 | $0.70 |
Key observations:
- “Website migration checklist” is the standout opportunity – 200 searches per month, difficulty of just 12/100. A well-structured checklist page targeting this keyword is highly rankable with minimal competition. The $1.20 CPC confirms commercial intent from agencies willing to pay for this traffic.
- “Website redesign SEO” carries a $5.00 CPC – indicating advertisers see real commercial value in this intent. A page targeting this keyword would attract business owners mid-decision.
- Terms like “website traffic drop” and “lost google rankings” show no measurable Australian search volume by keyword, but they represent the problem state your audience is searching from. Write content that answers those questions directly – it will surface via longer-tail and semantic variations that do carry volume.
- The absence of high-difficulty scores across this cluster means the topic is genuinely underserved in Australian search. There’s a real content gap here.
Tools & Resources
- Google Search Console – Free. Non-negotiable. Use it before, during, and after any website migration. The 404 report and performance data are your two most important migration tools.
- Google Analytics 4 – Free. Cross-reference with Search Console to understand which pages drive conversions, not just traffic.
- Screaming Frog SEO Spider – Free up to 500 URLs. Crawl your old site to extract every URL; crawl your new site post-launch to verify every redirect resolves correctly. Essential for any site over 50 pages.
- Ahrefs / SEMrush – Paid. If you want to see all keywords a page ranks for (not just what Search Console shows), use these to audit pages before migration. Worth the investment for sites with significant traffic.
- Redirect Manager plugins – Free/paid. On WordPress: “Redirection” plugin. On Shopify: built-in URL redirects under Online Store → Navigation. On Squarespace: URL Mappings under Settings → Advanced.
- Notion or Google Sheets – Free. Use as your redirect map. Two columns: old URL, new URL. Share with your developer as a deliverable checkpoint.
Pre-Migration Checklist (print this out):
- Export all indexed pages from Google Search Console
- Identify top 50 pages by organic clicks (last 90 days)
- Confirm new site URL structure with developer
- Build old URL → new URL redirect map
- Confirm developer has redirect implementation in project scope
- Verify all redirects before launch day
- Set up post-launch 404 monitoring in Search Console
- Schedule weekly Search Console check for 90 days post-launch
Module Summary
- Your website has more SEO value than you realise. Even without active SEO investment, pages accumulate trust and ranking over time. A site that’s been live for two or more years is almost certainly receiving organic traffic from keywords you haven’t consciously targeted.
- A website migration without 301 redirects is a traffic wipe. Google treats missing pages as content that has been removed. Without redirects, all the ranking authority those pages earned disappears – usually within 60 to 90 days of launch.
- “That’s an SEO issue” is not an acceptable answer from your developer. Basic 301 redirects are a standard deliverable in any professional website build. Make it explicit in your brief. Ask for it in writing. Check it before you sign off on go-live.
- The fix is not complicated – but the timing is critical. A redirect map built before launch costs a fraction of what recovering from a traffic collapse costs. Do the audit first. Build the map. Then launch.
CMO Eugene – Ranked Digital Marketing, Australia
ranked.com.au
