Answer:
well, there's actually several different meanings of patronizing, but the two major ones are to "treat with an apparent kindness that betrays a feeling of superiority," and another meaning is "frequent as a customer.", which is like at a grocery market, clothing+accessories store, makeup shop, sports equipment store, restaurant, fast food, etc.
so if you patronize your favorite store, that would mean you're a customer and you go there a lot, but if you patronize your little brother, that means you treat him in a kind way but you talk to him as if you're superior to him.
~hope i helped ouo have a nice rest of ur day~
lots of love,
lee