Often used as a greeting. Means hello, what’s up, how are you or similar phrases. Sometimes groups all the general greetings together such as Hi, How Are You or Hello, Is Everything Alright? When two friends meet up one would open with “Yes Yes” followed by a suffix such as bro, man, blud, etc. In some cases it can, although loosely, be translated as “I acknowledge you’re presence” or “I am announcing mine”.
Do not confuse with “Affirmative affirmative”, “Positive, positive” or the antonym “No, no”