The phrase "new booster" refers to something that helps improve or increase something, usually by providing a fresh or additional element of support or enhancement. Full definition
The vast majority of new booster seats earn the top rating of BEST BET from IIHS, but bad designs continue to slip through. (iihs.org)
The highly - anticipated new booster pack for the popular Warhawk PS3 frag-fest will land on the PSN August 28th. (thatvideogameblog.com)
It adapts to the computer just as well as the tablet, and a steady stream of new boosters and new Arena runs means that you never have to spend a penny on it to enjoy playing. (gamingtrend.com)