The Google My Business (GMB) API does not store historical data for reviews.
This means that no matter what date range you select in your request, the API will always return all reviews currently available for the business.
To build your own history of reviews, you should import the review fields along with the Review Created Time field in a Google Sheets, Microsoft Excel or in a database.
This will allow you to track when each review was originally posted and store that information in your reporting tool or database.
Example of a useful request:
Reviewer Name
Text Review
Review Created Time
Review Updated Time
Star Rating
The Average Review Rating field returns the overall average rating for the business.
It should not be included in a request that is segmented by individual reviews, as it is not tied to a specific review and will lead to misleading results.
