The List datatype in Redis is an ordered collection of items referenced by a Redis key. Redis allows you to access and modify a list by index or push/pop operations. In Redis, the two ends of a list are referred to as the left and the right. The left corresponds to the first element or head of a list and the right coresponds to the last element or tail of a list.
More detail on the List datatype and all the commands that can be used in conjunction with them can be found in the official Redis documentation at Redis.io.