HOw to change the UV map rate?

(SOrry if my title is unclear, don’t know the words)
If i am making say a floor, and i place a huge flat cube into the level, and apply a material.
I get this:
(UPLOAD ERROR, I’ll just describe it: if i use a brick material, i get giant bricks)
So how would i scale the size of these bricks?

(Really sorry, don’t know the terminology when it comes to materials)