How do put options work?

I am trying to understand “put options”. I get some of the basics, but in the end, I get lost. So if I buy a “put options contract” at a strike price of $230, and the current price of the stock is $240. Let’s say the stock value then drops to $210, and I want to sell my “put”. I understand that this is where it becomes attractive for the buyer to want to purchase my “put” because if he/she purchased my “put” it gives them the “right”, but not the obligation to sell those shares for $230, opposed to the current market value of $210. This is the part where I get lost: who do they sell this stock to? I’ve searched you tube but no one answered that question