"Can't wait for Trainers to experience the power of Friendship-level bonuses!

Originally shared by Niantic

"Can't wait for Trainers to experience the power of Friendship-level bonuses! With added Friendship bonuses, Trainers might be able to take on a higher level raid with fewer people. Extra Premier Balls will also help offset local team imbalances at raids. Additionally, high Friendship-level friends have a better chance of receiving a Pokémon with a higher stat value when trading." —Matt Ein, Game Designer