Indexing is when Google crawls a page, processes the content and stores it in its database. This is also when Google decides if a page is eligible and valuable enough to be listed in search results. While it’s unrealistic to expect every single one of your web pages to be indexed on Google, it’s important to check that your most important web pages are indexed by checking Google Search Console.
See also: Mobile-first indexing, Canonical tag, Crawl budget, Google Search Console
