Data scientists use reviews as a source of data for AI and machine-learning models. They extract reviews from Google and feed them into AI and machine-learning models. Developers use it as a source of data for their algorithms.
Here's a tutorial to make it easier for you to extract all reviews from Google Maps by using Outscraper Reviews Scraper.
You can use Google Maps Reviews Scraper to scrape all reviews only with single task. Additionally, there is an API for developers.
Tutorial: https://outscraper.com/how-to-export-google-reviews/
Google Maps Reviews Scraper : https://outscraper.com/google-maps-reviews-scraper/
Google Maps Reviews API : https://outscraper.com/google-maps-reviews-api/