What is the meaning of "I’m on it"?

The meaning of "I’m on it" is:

I will take care of a situation


What is the definition of "I’m on it"?

The definition of "I’m on it" is:

I will take care of a situation



"I’m on it" means

I will take care of a situation

Example Sentence:

A: Son, can you go to the store and get some milk?
B: I’m on it!