Enum
SearchRelevance
How close a hit must be to the search term before it is worth returning.
Enum values
DEFAULT
The floor guideline search has always used, tuned for someone typing into the search box, where an unrelated hit is more costly than a missing one. The default for every query that does not say otherwise, so existing callers keep the behaviour they had.
LOW
A markedly lower floor -- roughly a tenth of {@see self::DEFAULT}. For callers that would rather sift loosely related content than miss it, such as gathering a broad candidate set to rank or summarise themselves. Expect noticeably more hits, and noticeably weaker ones.