Microsoft is currently giving away a three-month test subscription for the PC Games Pass to selected players.
If you play the Microsoft Games Halo Infinite, Forza Horizon 5 or Age of Empires IV between your respective launch and up to February 28, 2022, you will give you this test subscription.
The offer is only valid for players who have not yet had a subscription for Xbox Game Pass for Console or PC Game Pass.
Say: Only for new customers.

Whether you are corrected for the test subscription of the PC Game Pass, you will learn when you log in to Xbox.com at the bottom of your account:
* PC Game Pass on Xbox.com