Indexing means that Google adds a page to its index – the huge directory from which search results are built. Only indexed pages can rank on Google.
Indexing follows crawling: Googlebot fetches the page, Google analyses the content and then decides whether the page goes into the index.
How does indexing work?
Not every crawled page gets indexed. Google leaves out pages that offer no value of their own or that you exclude yourself. Typical reasons why a page is missing:
- a noindex tag, often set by mistake after a relaunch
- a canonical tag pointing to a different address
- duplicate content or very thin content
- missing internal links, so Google considers the page unimportant
The page indexing report in Google Search Console shows which pages are in the index and why others are missing.
Why does indexing matter?
A page that is not in the index does not exist as far as Google is concerned – however good it is. Online shops often lose entire categories this way, medical practices individual treatment pages that should be bringing in enquiries.
AI answers also frequently draw on search indexes, Google’s AI Overviews being one example. With ongoing SEO management, you regularly check that all important pages are indexed and fix errors before they cost you revenue.
