Learn what "i'll let you" means, when people say it, and how to use it naturally in English.

It means I will tell you later if any new information appears.
From I Think My Wife Wants To Kill Me S2, Episode 52
He is reassuring someone that he will update them if more information comes in.
Use it in follow-up messages, work updates, or casual conversations when you want to promise future notice. It sounds natural and polite.
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