Moving an e-commerce website to a modern framework sounds like a development project.
A migration can change URLs, rendering behavior, canonical tags, pagination, structured data, internal links, redirects, sitemaps, and even which pages search engines are able to discover.
That means a website can become technically faster and cleaner while simultaneously becoming harder for Google to understand.
The application can work perfectly for users while search engines see a very different website.
Imagine an old product page has accumulated rankings, backlinks, historical signals, and internal links over several years.
Did the old URL redirect correctly? Is the redirect permanent? Does it point directly to the equivalent new page? Are internal links still referencing the old URL? Is the new URL included in the sitemap? What canonical does the new page declare?
A URL change isn't simply a routing decision once search engines have already discovered the old version.
One of the easiest ways to lose organic visibility during a migration is treating redirects as something to configure after launch.
In fact, sending large numbers of unrelated URLs to the homepage can create a confusing experience for both users and search engines.
Canonical problems are particularly dangerous because the page itself may look completely normal.
Now the application and the SEO signals disagree about which document should be indexed.
I've learned to treat canonical validation as a separate migration test rather than assuming it is correct because routing works.
Product canonical Category canonical Brand canonical Pagination behavior Parameterized URLs Protocol and hostname consistency
Filters, sorting, pagination, categories, brands, colors, availability states, and tracking parameters can all affect URLs.
If every possible combination creates a crawlable URL, a relatively small product catalog can produce a very large crawl space.
The question is whether every filter state needs to become a search-engine-accessible page.
Treating both groups identically can create unnecessary indexation and crawling.
I've been dealing with many of these questions while working on the SEO of AsanGSM, an e-commerce website focused on mobile repair tools and equipment.