Google indexing is the process by which Google adds web pages to its database (the Google index) after crawling them, making them eligible to appear in search results.
Indexing is the process by which Googlebot accesses a page (crawling), analyzes the content and adds it to the Google index — the giant database from which Google selects the results shown for each search. An indexed page can appear in the SERP; a non-indexed page does not exist for Google users. You can check indexing with "site:yourdomain.com" in Google or in Google Search Console (the Coverage/Indexing report). Reasons a page is not indexed: robots.txt Disallow, meta robots noindex, poor content quality, server errors, or simply not crawled yet.
A non-indexed page cannot rank. You can publish 100 articles and if they are not indexed, you get no SEO benefit. Monitoring indexing in GSC is essential for any SEO campaign.
Source: Google Search Console — Index CoverageCrawlability is the ability of Google's robots to access, navigate and read your site's pages — an essential prerequisite for indexing and ranking.
An XML sitemap is a file that lists all the important URLs of your site, helping Google discover and index them faster and more completely.
Robots.txt is a text file placed at the root of a site that tells crawlers (Google, Bing, GPTBot) which pages they may or may not access and index.
Google Search Console is Google's free tool that shows how your site appears in search: which keywords bring traffic, which pages are indexed and which technical errors exist.
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