What does ‘crawled but not indexed’ mean in Google Search Console?

Crawled but not indexed' in Google Search Console refers to pages that Googlebot has visited and processed, but has not yet added to its search index. This means the pages are known to Google, but won't appear in search results. This status can occur for various reasons, such as the page being considered low quality, a duplicate, or having technical issues that prevent indexing. It's not about deleted pages (which would typically show as 404 errors or 'not found'), pages lacking backlinks (which can still be indexed), or the entire website not being indexed (which is a broader issue). While internal links are important for discoverability, their absence doesn't directly translate to a 'crawled but not indexed' status; rather, it might prevent crawling in the first place.