What casual and unrated boosting covers
Casual boosting is for the non-competitive side of Rocket League — the games that don't touch your ranked badge. This is where Rocket Pass XP, season and weekly quests, and plain warm-up matches live, along with modes that only ever ran unranked. Casual still tracks a hidden MMR to match you into fair games, but it shows no visible rank and never appears on the competitive ladder, so nothing done here moves your Solo Duel, Doubles or Standard rank. Use it to level a Rocket Pass, clear quest objectives, or warm up an account without risking a competitive rating.