This module aids in cleaning up a database (datawash and more).
You might want it when copying a production database to a development environment, where you might want API keys to be replaced or removed, passwords and other details removed and other settings modified.
The module provides a simple, straightforward plugin type that can be used by other modules to provide new cleaners. Out of the box, it comes with a number of plugins that let you clear/modify site data, API keys for the various Google related moduls (GA, GTM, Recaptcha) and more.