Yeah, i have the money to cover. So if i did a covered put at $6 strike price, they take $600 from my account and hold it until the put expires. I usually only do week of puts. If AMC would have gone below $6 by Friday end of day, I would have had to buy 100 shares of the stock at $6/share, but the $40 premium i got would lower my basis so i would have a basis of $5.6 per share. If AMC doesn't go below $6 by Friday end of day, I get to just pocket the $40 premium and get my $600 back.
Throughout the week you can always buy back your put, sometimes at a loss if the volitility is crazy or you can jump out if say the stock shot up for a partial gain anytime during the week when the market is open.
I usually don't want the stock. I just like collecting my premiums. I try to weigh risk and keep my strike price far enough away from how the stock is trending. I have made ok money doing so, nothing that will make me rich. But if I can pocket $100-300 during a week, i'm happy.