Cheat engine general

Value - anything that is scannable. Healthbars, bullets, scores, even walls, objects ect.

Address - a thing which holds the value. 1 address = 1 value

NOP - No operation. It means that the address won't function the value (it won't move at all and it's a little different from freezing option). NOPping causes lots of crashing if you havent mastered it.

Q: Why do I get "??" instead of actual value?
A: It's because you either turned off the game (or it closed by itself) or the value went to other address (this doesn't happen actually, only in newest games and sometimes even not)

Q: What does Freeze function do?
A: It freezes the value of the address so it won't move. For example, you have found the value of your multi in THAW and you want it to be at one state, so you tick the freeze option and the multi won't increase nor decrease.

Q: I found the address but i restarted the game and it shows "??" or the value which doesn't affect something which used to affect in the past. What happened?
A: You found an address which is dynamic which means the value that is in the address will change the address every time you restart the game or sometimes even when you will restart the game! For this you can use pointers or NOP the addresses.