boltTLDR
Google skips indexing crawled pages mainly because they lack unique value; Marie Haynes shares insider tips from a Google event and a process to identify and fix commodity content issues.
Marie Haynes outlines why pages get stuck in Google's crawled-but-not-indexed status, citing firsthand observations from the Google Search Central event in Toronto where a presenter explained that Google now favors content with personal experience or knowledge others don't have. She identifies two causes—technical issues (rare, but fixable) and quality problems (far more common)—and walks through her own methodology for analyzing whether a page qualifies as commodity content or offers genuine value that users would benefit from seeing in search results.