Meaning of “okay” - Learner’s Dictionary

okay

exclamation (also OK) uk us /əʊˈkeɪ/
AGREEING

A1 used when agreeing to do something or when allowing someone to do something:

"Let's meet this afternoon." "Okay."
"Can I use the car?" "Okay."
BEFORE SPEAKING

A2 used before you start speaking, especially to a group of people:

Okay, I'm going to start by showing you a few figures.

(Definition of “okay exclamation” from the Cambridge Learner’s Dictionary © Cambridge University Press)