What is Indexation?
Indexation is the process by which search engines discover, crawl, process, and store web pages in their index — making them eligible to appear in search results. A page that is not indexed cannot rank, regardless of its content quality or optimisation.
Why It Matters
Indexation is the prerequisite for everything else in SEO. A page cannot rank if Google has not indexed it. Content quality, backlinks, technical optimisation — none of it matters for a page that does not exist in Google's index. Yet indexation problems are more common than most people realise. Google's own data shows that most pages on the web are never indexed, and even on well-maintained sites, indexation issues can affect significant portions of the content.
Google has become increasingly selective about what it indexes. With limited resources and a growing web, Google now evaluates whether a page is worth indexing before adding it. Pages with thin content, duplicate content, or low authority may be discovered and crawled but never indexed. Understanding and managing indexation is a core technical SEO skill.
How It Works
Indexation follows a pipeline:
- Discovery — Google finds the URL through internal links, external links, XML sitemaps, or manual submission via Search Console. Discovery means Google knows the URL exists, nothing more.
- Crawling — Googlebot requests the page and downloads the HTML. If the page returns a 200 status code and is not blocked by robots.txt, the content is retrieved for processing.
- Processing — Google renders the page (executing JavaScript), extracts the content, analyses the text, identifies entities, and evaluates quality. During processing, Google decides whether the page merits indexing.
- Indexing — If the page passes Google's quality threshold, has unique content, and is not marked noindex, it is added to the index. The page is now eligible to appear in search results for relevant queries.
Common Mistakes
Assuming that all pages on a site are indexed. Google Search Console's Coverage report often reveals that 30-50% of URLs on a site are not indexed — either by choice (noindex, canonical to another URL) or because Google decided not to index them (crawled but not indexed, discovered but not crawled). Regular monitoring of indexation status is essential.
The other mistake is using the URL Inspection tool to force-index low-quality pages. If Google has chosen not to index a page, submitting it again will not help. The solution is improving the page's content quality, internal linking, and uniqueness so Google considers it worth indexing. Forced indexing of thin content can actually harm the site's overall quality signals.
How I Use This
My SEO automation monitors indexation status across all pages — tracking which pages are indexed, which are excluded, and why. The system flags indexation drops (pages falling out of the index) and new pages that are not being indexed within expected timeframes. The advanced SEO audit diagnoses indexation problems at the root cause level.
References & Authority
This term is recognised by established knowledge bases:
Related Services
How BrightIQ uses Indexation
This concept is central to the following services:
Related Terms
Canonical Tag
A canonical tag (rel=canonical) is an HTML element that tells search engines which URL is the preferred version of a page — consolidating ranking signals when the same content is accessible through multiple URLs, preventing duplicate content issues.
Crawl Budget
Crawl budget is the number of pages a search engine will crawl on your site within a given timeframe — determined by your server's capacity and the perceived value of your content. Managing crawl budget ensures Google spends its limited crawling resources on the pages that matter.
Robots.txt
Robots.txt is a text file at the root of a website that tells search engine crawlers which pages or sections they are allowed or disallowed from crawling — controlling how search engines access and discover content on the site.
XML Sitemap
An XML sitemap is a file that lists all the important URLs on a website in a format search engines can read — helping Google discover, crawl, and understand the site's structure, especially for large sites, new sites, or pages with limited internal linking.