"Extra perks" refers to additional benefits or advantages that come along with something, often in addition to what is expected or promised. Full definition
These sets provide players with extra perks for wearing one or more pieces, such as health regeneration, shields, increased perk.. (accelerated-ideas.com)
You'll be able to take advantage of extra perks for using that credit card with the company tied to it such as extra air mile bonuses, extra hotel reward points, etc.. (echeck.org)
It also flows into the sleek, gourmet kitchen offering appliances large and small, as well as extra perks like a wine cooler, ice maker and an espresso machine. (luxuryretreats.com)