BANK Nifty Deep ITM 28000 put call 6Lakhs OI, what does that mean?

I have seen 28000PE call for 28FEB banknifty expiry is having 6.16Lakh OI, what does that mean ? (bank nifty is going to above 28000 at the end of the expiry) and in the sellers point of view what are the scenarios he can profitable?

Can check, to know more about OI and how to decode it.