What we have seen across UK replatforming programmes is this: the ecommerce platform migration guide that actually gets used is short on theory and long on owners, gates, and rollback paths. This playbook is the structure StoreBuilt applies before any Shopify go-live.
Shopify migrations or Contact StoreBuilt.
Table of contents
- Keyword decision and research inputs
- Step 1: Business case and scope
- Step 2: Data and catalogue mapping
- Step 3: Integration architecture
- Step 4: Storefront and checkout build
- Step 5: SEO and redirect governance
- Step 6: QA and UAT
- Step 7: Launch runbook
- Step 8: Post-launch measurement
- Migration guide checklist
- StoreBuilt example
- Final StoreBuilt point of view
Keyword decision and research inputs
Primary keyword: ecommerce platform migration guide UK
Secondary keywords: replatforming guide UK ecommerce, Shopify migration guide UK, ecommerce migration checklist UK.
Search intent: problem-solving and implementation. Funnel: middle. Page type: playbook.
Step 1: Business case and scope
Document why you are migrating, what success means (revenue, margin, speed, international), and what is explicitly out of scope. Tie scope to a realistic migration timeline.
Step 2: Data and catalogue mapping
| Workstream | Deliverable |
|---|---|
| Products & variants | Field mapping, cleanup rules, media |
| Collections & navigation | New taxonomy vs legacy URLs |
| Customers & orders | Historical data policy (GDPR-aware) |
| Content | Blogs, policies, landing pages |
Step 3: Integration architecture
Inventory ERP, WMS, POS, reviews, loyalty, subscriptions, tax, and analytics before theme polish. Integration failures cause more launch delays than design debates.
Step 4: Storefront and checkout build
Theme or headless build aligned to merchandising, markets, shipping zones, and payment methods. Configure B2B or wholesale if in scope.
Step 5: SEO and redirect governance
- Export all indexed URLs from Search Console and Bing Webmaster Tools
- Build redirect tiers: revenue URLs first, long-tail second
- Plan canonical and hreflang for international stores
- Prepare sitemap and IndexNow submission list
Deep dive: SEO impact migrating to Shopify.
Step 6: QA and UAT
Test checkout, tax, shipping, refunds, gift cards, subscription flows, and admin workflows. Crawl staging for broken links and orphan PDPs.
Step 7: Launch runbook
Named roles for DNS, redirects, monitoring, customer comms, and rollback. Avoid Friday cutovers and unstaffed weekends.
Step 8: Post-launch measurement
Track organic landing pages, conversion rate, integration error logs, and CS ticket themes for 30 days. Submit updated sitemap to Google and Bing.
Migration guide checklist
- Scope signed with exit criteria per phase
- Data mapping reviewed by merchandising and finance
- Redirect sheet tested on top 500 URLs
- Integrations load-tested at peak order volume
- Launch runbook with rollback window
- Bing and Google sitemaps resubmitted post-launch
StoreBuilt example
A UK food subscription brand migrating from a custom stack used this guide structure to split work across ops, marketing, and finance. Redirect governance alone surfaced 220 legacy campaign URLs that would have 404’d on launch day. Go-live held subscription renewals and organic traffic within tolerance.
Final StoreBuilt point of view
A platform migration guide UK teams ignore is just documentation theatre. The playbook only works when every step has an owner, a gate, and a measurable pass/fail — especially SEO and data.