ctx parameter inside triggers and actions provides a simple key/value storage mechanism. The storage is persistent, meaning that the stored values are retained even after the execution of the piece.
By default, the storage operates at the flow level, but it can also be configured to store values at the project level.
Piece Reference
Persistent Storage
Learn how to store and retrieve data from a key-value store
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These storage operations allow you to store, retrieve, and delete key-value pairs in the persistent storage. You can use this storage mechanism to store and retrieve data as needed within your triggers and actions.