"OK" is a word often used to show agreement, understanding, or acceptance of something. It can also mean that things are okay or going well. Full definition
So glad that you like the video — I am so ok with what you have done here — I am proud to say that we have not sent sandwich's once this week! (easylunchboxes.com)
Oh, and just for the record: they're not OK for adults, either. (romper.com)
Ok so with our new swell setting up nicely we thought we'd head back down to the Southern end of the island. (baliwaves.com)