User Session Caching Pattern

This pattern is commonly used with shopping carts and other user history data that a web application may want to associate with user cookies. Storing too much in a cookie can have a negative impact on performance as the cookie size grows and is passed and validated with every request. A typical solution uses the cookie as a key to query the data in a database. Using an in-memory cache, like Azure Cache for Redis, to associate information with a user is much faster than interacting with a full relational database.

Further reading at Cache ASP.NET Session State Provider | Microsoft Docs