Advice vs Advise
Quick answer: Advice (with a C) is the noun — the suggestion itself. Advise (with an S, said with a Z sound) is the verb — the act of giving it.
Advice
Noun: a recommendation or opinion offered as guidance.
“My coach gave me good advice.”
Advise
Verb: to offer a recommendation; to counsel.
“I advise you to start early.”
How to remember it
iCe is a noun, adviSe has the verb's Z sound — same as device/devise.
Common mistake
'Thanks for the advise' — the thing you receive is advice.