Some League of Legends objectives require you to earn points simply by playing games, though there are a few specifics you should know about!
Requirements
You start at 1.3 points per minute played in any matchmade game mode. This includes things like Co-Op VS AI and time-limited modes like URF and Arena. Teamfight Tactics matches are sometimes included, and the best way to find out if that's the case is to click on the objective and read the details.
You can also get a few bonuses to earn those points in a hurry:
- +30% for winning the match
- +30% for playing with friends or as a premade
Play together and play to win, and you'll rake in the BXP.