I140 notice explaining uscis action is mailed

On December 21, 2020, we began reviewing your Form I-140, Immigrant Petition for Alien Worker, Receipt Number LIN***.

We mailed you a notice informing you of the action we intend to take on your case.

Please follow the instructions in the notice and submit any requested materials.

I know i need to wait for the actial notice. But any experience someone can share please