what is double xp for Halo?

it doesnt give you doublee skill points but its always a certain game type and you get xp 2 times faster and it under a playlist called double exp weekend its best if it on griff ball u lvl up the fastest that way

Double XP playlists change every weekend. It's usually something fun to play like grifball, rocket race, infection, or fiesta.

You just get double the exp..

If you win a game you get 2 exp not the normal 1.