Ecommerce technical SEO is the unglamorous half of search work on a store: making sure the pages you want indexed can be found, are not competing with near-identical copies of themselves, and are not buried under millions of filter combinations no shopper asked for. On a small catalogue it barely matters. On a store with variants, filters, sorts and pagination, it decides whether Google ever reaches the product pages that make money. Google documents most of this directly, which is unusual and useful: a buyer can check a proposal against the search engine's own guidance rather than against an agency's opinion. This page covers the problems worth paying to fix, the ones that are oversold, and how to test a provider's diagnosis.
Faceted navigation, the biggest self-inflicted problem
Filters are the defining feature of a store and the defining hazard of its crawl. Google's guidance on managing faceted navigation URLs states the mechanism plainly: the common implementation based on URL parameters can generate infinite URL spaces, which harms a site through overcrawling, where crawlers access a very large number of faceted URLs before determining they are useless, and through slower discovery crawls, because time spent on useless URLs is time not spent on new, useful ones. Google's recommendation is a fork rather than a fix: if you do not need the faceted URLs indexed, prevent crawling of them; if you do, make sure they follow the documented best practices. Google also notes that crawling faceted URLs tends to cost sites large amounts of computing resources, which is why this shows up on hosting bills as well as in Search Console.
Duplicate product pages and canonical discipline
Stores generate duplicates naturally: the same product reached through three categories, a variant per colour with near-identical copy, a printable view, a session parameter appended by an old tracking script. Google's canonicalization documentation explains that when multiple URLs carry the same or very similar content, Google chooses one as canonical, and that you can indicate your preference with a rel canonical link, redirects and sitemaps rather than leaving the choice to the crawler. Good ecommerce technical work resolves the duplication at its source where possible, consolidates the rest deliberately, and then verifies in Search Console that the URL Google selected is the one that earns the sale. A provider who proposes adding canonical tags without first asking why the duplicates exist is treating a symptom.
Crawl budget, and who actually needs to care
Crawl budget is the most oversold diagnosis in ecommerce SEO. Google's own guide says so in its opening lines: if your site does not have a large number of pages that change rapidly, or if your pages seem to be crawled the same day they are published, you do not need the guide, and keeping your sitemap current while checking the Page Indexing report is adequate. Google scopes the advanced guidance to very large sites with over a million unique pages changing moderately often, to sites of ten thousand or more pages with content changing daily, and to sites where a large share of URLs sit in the Discovered, currently not indexed state. If a proposal leads with crawl budget for a two thousand product store, ask which of those three descriptions applies. Usually none does, and the real problem is the faceted URL space inflating the page count.
How to vet the diagnosis before you buy the fix
Ask the provider to show you the evidence in your own Search Console before quoting the work: the Page Indexing report, the crawl stats, and a sample of the URLs they intend to remove from crawling. Ask what revenue-bearing pages are currently not indexed, since that is the only number that connects the work to the business. Ask them to name which of their recommendations comes from Google's published documentation and read it yourself; the documentation is public and the good recommendations survive the check. Agree a rollback plan for anything that blocks crawling, because a mistaken disallow can remove earning pages fast and restore them slowly. When you shortlist a technical SEO company, weigh what each one publishes about scope, minimum engagement and named clients above what its audit deck asserts.
Questions people ask about ecommerce technical seo
Should I block my filter URLs from being crawled?
Google gives a fork rather than a rule: if you do not need faceted navigation URLs indexed, prevent crawling of them; if you do need them indexed, follow the documented best practices for those URLs. Decide by asking which filter combinations have real search demand, then treat the rest as crawl overhead.
Does my store have a crawl budget problem?
Probably not. Google's own guide says sites without a large number of rapidly changing pages, or whose pages are crawled the same day they are published, do not need it. The advanced guidance targets very large sites, sites of ten thousand or more pages changing daily, and sites with many URLs stuck in Discovered, currently not indexed.
Do variant pages need their own URLs?
Only where shoppers search for the variant. Where they do not, near-identical variant pages create duplication that Google will consolidate anyway. Google's canonicalization guidance lets you state a preference with a canonical link, redirects and sitemaps, so choose the URL that should earn the sale and make the signals agree.
How long before technical fixes show up in traffic?
Recrawling and reprocessing take time, and large catalogues take longer. Judge the work first on indexation of revenue-bearing pages in Search Console, which moves before revenue does, and set the commercial review a full quarter out rather than a month.