A Helium 10 tool that checks whether a listing is actually found under specific keyword phrases — distinct from, and later than, simply having the phrase's individual words somewhere in the listing text. Commonly reveals that a listing contains all the words of a target phrase but not the phrase itself, so the phrase isn't indexed.
Fix: add the missing exact phrase to the listing, then recheck after 15–60 minutes for Amazon to reindex. Middle check in the sequence *indexed (words present) → found (Index Checker) → ranking well (Helium 10 Keyword Tracker)*, part of the Main Keyword & Organic Listing Validation Protocol.
Index Checker's 'traditional index' column checks whether the exact keyword phrase — not just its individual words scattered through the copy — appears in Amazon's search results for that ASIN; a listing can contain every word of a target phrase and still show as not indexed for it. Workflow: upload the master keyword list with 'remove duplicates' and 'maintain phrases' checked, add any unchecked phrase verbatim into the listing, then recheck 15 minutes to an hour later.