SearchWP uses Stopwords to both optimize the index and increase relevancy of search results. The primary method of customizing the list of Stopwords is by way of the Settings tab of the SearchWP Settings screen. You can however programmatically filter Stopwords as well.
Manipulate partial match tokens during partial match logic application.
By default SearchWP utilizes its background process when handling delta updates. This helps keep page load times to a minimum. If instead you would prefer that SearchWP applies delta updates inline with content edits you may use this hook.