Is there a rate limit on the API?
For Places Insights API, there is a default rate limit of 600 queries per minute.
What is the difference between 'included_primary_types' and 'included_types' in the TypeFilter?
included_primary_types: Filters for places where the specified types are their main or primary category. These places might also have other secondary types.included_types: Filters for places that have the specified types as any of their categories, regardless of whether it's the primary or secondary type.
For example, a search using included_primary_types set to restaurant would
return places whose primary function is to serve food, whereas included_types
set to restaurant would return places that serve food even if they have
another primary category, such as a museum with a cafe.
For further reading, visit Place Types.
How do I define a custom search area that isn't a circle?
You can define a custom search area using a polygon. Provide a list of latitude and longitude coordinates that define the vertices of a single polygon in a counter-clockwise order. The first and last coordinates must be the same to close the polygon.