Heroic Inspiration
I can choose to give you inspiration for a variety of reasons. Typically, I’ll award it when you play out your personality traits, use clever tactics, and otherwise portray your character in a compelling way.

You can have up to three uses of Heroic Inspiration at any time. You cannot gain more than three.

Using Heroic Inspiration

If you have Heroic Inspiration, you can expend it when you make an attack roll, saving throw, or ability check. When spending your inspiration, you may roll again and take the higher roll. This can only be done once per turn.

Additionally, if you as a player have inspiration, you can reward another player for good roleplaying, clever thinking, or simply doing something exciting in the game.

When another player character does something that really contributes to the story in a fun and interesting way, you can give up your inspiration to give that character inspiration - This is down to DM Discretion.