The premium lowers your cost basis and adds income; the trade-off is that if the stock rallies past the strike, your shares are called away at that price and you miss the rest. If the stock falls, you still own it and the premium only softens the loss.
It is the second half of the-wheel. Selling calls repeatedly against a long-term holding is a common income approach with a clear ceiling.
Example: you own 100 shares at $48. You sell the $50 call for $1.20. If the stock is above $50 at expiration you sell at $50 plus the $1.20, a $3.20 gain. If it stays below $50 you keep the $120 and the shares.
Related: cash-secured-put, the-wheel, call-option, assignment