Every game is now a job, you gotta log in daily and do your hours or else you get fomo. You can only do one or two battle pass games at a time, you will not find the time for three of them. The rewards you get from them suck too cause everyone else gets them as well. It sucks so much ass.
They usually cost about 10 bucks and last a season (usually about three months). You can level them up to 100 usually, and get little rewards at each level (usually including enough in game currency to buy next seasons battle pass). They give you challenges to level it up, but generally these are time gated so you have to constantly be playing to get all the way through it.