Is it advise or advice?

Which sentence is correct between these two:

• a. Could you tell me your advise?
• b. Could you tell me your advice?

If your answer was b, you got it right! So what's the difference?
Advice /ədˈvɑɪs/ or /ad-vahys/ is a noun that means a recommendation or suggestion about what to do or how to handle a situation. Advice is something that we get from friends, bosses, or lawyers.
Advise /ədˈvɑɪz/ or /ad-vahyz​/ is a verb that means 'to offer an opinion or suggestion' or in other words, to give advice to someone. Advise is something that we do. 

Note that they also sound a little differently. Advice is pronounced with an /s/ sound, as in “ice,” while the verb advise is pronounced  with a /z/ sound like the “-ize” in "size". 

Regarding their different forms:
Advice is uncountable so we would never say 'advices'. We can, however, say pieces of advice. 
Advise, on the other hand, is a regular verb with the usual past, present and future tenses: advised, advise, will advise.

Let's have some examples and common expressions:
1. People run away from her at parties because she's always giving unsolicited advice.  Unsolicited advice refers to advise that is being given without being asked, and is therefore usually unwanted. 
2. I usually avoid telling people that I'm a lawyer because people always try to ask for free legal advice. 
3. His manager advised him to accept the terms being offered in the contract. 
4. Please advise your students to upload requirements through the official website. 
5. That's dangerous. I wouldn't advise you to do that. 

Exercises: Advice or advise?
1. She took the trip against her doctor's __________________. 
2. The team manager should ________________ his team members about the appropriate steps to be taken.
3. I will ask Prof. Norton to ____________ us on how to proceed.
4. I could always count on him for good _____________________.
5. Experts _____________ that hours spent by kids in front of a screen should be limited. 

​Answers:
5. advise
4. advice
3. advise
2. advise
1. advice