Definition 1: In WordPress, a filter is a type of hook that allows developers to modify data before it is used or displayed. Filters can change things like content output, query parameters, or plugin settings by passing data through a custom function. For example, a filter might be used to adjust the title of a post before it appears on the page.
In the context of SearchRovr, filters can be used to tweak what content gets indexed or how search results are formatted, giving developers control without modifying core code.
Definition 2: Filters allow users to narrow or refine search results by categories, tags, or other taxonomy values. SearchRovr supports content filtering in advanced search configurations.