Example of a covered call
Let's say ABC Company makes components used in making OLED screens and I own 100 shares. The stock of ABC Company is up 48% for the year. Recent gains have been strong, so I'm worried that it could go down in the near term. But the company also has catalysts coming with new products, so I also want to keep my shares for the long term.
As of this writing, ABC Company stock trades at $160 per share. I could sell one call option with a $180 strike price that expires in 4 months, for about $600 based on current market prices. That's almost a 4% return on the value of my position. So long as ABC Company closes below $180 per share on the expiration date, I'll get to keep my shares and hopefully ride the position higher in moving forward, thanks to its new products. But I'll have also pocketed a little extra cash in the meantime from selling the call option.