Check 4 / 16 LOW impact Free
Custom 404 with search + bestsellers — recover +8% traffic
What this check is
A dead link should be a second chance, not a wall. A default 404 sends the visitor back to the browser; a designed one keeps them inside the store with search and the products that sell best.
How to implement it
Edit the 404 template in the Shopify theme to include the search form, a grid of bestsellers pulled from a best-selling collection, and links to the main categories. Keep the header and footer so the visitor can navigate anywhere from the dead end.
How to verify it
Request a URL that does not exist, for example /this-page-is-gone, and confirm the page returns status 404 while still rendering the search box and the bestseller grid.
This one is in the free tier
The free tier covers the first checks of every category — enough to close the obvious leaks. The full checklist adds the priority order, the impact score and the tool link for all 197 checks across 14 categories.
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