cache
A small stash of saved results your app keeps so it does not ask again.
Like keeping a takeout menu by the phone, a cache stores something you will likely need again so you can get it faster next time.
Apps cache API replies, images, or computed results to save time, battery, and money. The tradeoff is stale data if the source changes.
In practice, you set time limits, and you clear caches when debugging or after important changes. During development, a stuck cache is a common cause of confusion.