Tavern Brawler
You gain the following benefits.
Enhanced Unarmed Strike. When you hit with your Unarmed Strike and deal damage, you can deal Bludgeoning damage equal to dice:1d4|noform|noparens|avg (1d4) plus your Strength modifier instead of the normal damage of an Unarmed Strike.
Damage Rerolls. Whenever you roll a damage die for your Unarmed Strike, you can reroll the die if it rolls a 1, and you must use the new roll.
Improvised Weaponry. You have proficiency with improvised weapons.
Push. When you hit a creature with an Unarmed Strike as part of the Attack action on your turn, you can deal damage to the target and also push it 5 feet away from you. You can use this benefit only once per turn.
Sources
Player’s Handbook (2024) p. 202