Enable Redis Service
Redis is an open-source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. The socket file for the Redis store, when running, can be found in /Applications/MAMP/tmp. More information about Redis can be at https://redis.io.
Activate the checkbox "Include Redis server in GroupStart" if you want the Redis server to start and stop automatically when the Start/Stop button in the toolbar is clicked. The Redis PHP extension is automatically included when this option is enabled.
Further information can be found in the documentation.