This control allows you to insert your features into the search function for the geocoder. You can also opt to not include the geocoder, and/or you can limit results by country. See the other examples to see these in action! If you search “Kelowna”, you’ll see two results, the first of which (“BC”) is added from the custom features.
https://wpmaps-docs.mapster.me/fundamentals/maps/filters-and-lists#custom-search-filter