Storage by Zapier allows you to quickly store and retrieve small values of data. With Storage, you will be able to reference data between Zap runs or share data between different Zaps. This article walks through how to set up storage, set values, and retrieve values.
Storage keys can be no longer than 32 characters, and Storage values can be no larger than 25000 bytes. If you need to be able to store more than this, they'll need to look into using a proper external SQL app.