Behat is a PHP-based framework that can be used by business analysts, developers, and testers to bridge communication gaps and test websites. It uses the Gherkin language to write test scenarios, making it easy for testers to map tests to project acceptance criteria. Behat is well-suited for testing data/content on webpages, user actions like links and buttons, forms, migrations between content management systems, and end-to-end application flows. However, it is not recommended for testing dynamic data, images, frequently changing websites, filling production forms, or http responses throughout a site.