Hipsters and Dragons takes an in-depth dive into the Polearm Master feat, as well as providing some tweaks and rebalances you can implement in your own games.
Fighters, barbarians, paladins, and rangers get a little love with 3 new feats in D&D. Wizard's Laboratory discusses the new Crusher, Piercer, and Slasher feats, which improve your output with a specific physical damage type.
Feats are an optional rule that many D&D campaigns choose to use to let players customize their characters even more deeply than just choosing a race, class, background, and subclass. D&D Beyond's James Haeck discusses the new feats in Tasha's Cauldron of Everything.
Wizard's Laboratory discusses the new Eldritch Adept feat from Tasha's Cauldron of Everything.
Nerdarchy discusses the new feats available in Tasha's Cauldron of Everything.