Is there any way to properly improve skin complexion?

When I was young, I lived in an era when it was embarrassing to put sunscreen on your face. So in the summer, men naturally had a bronzed face.

I thought it was natural, but I didn't think it would be abusive to the body.

So, I have a lot of worries these days because of my skin discoloration. My face is so dark that I look like a country farmer, so I'm asking my friends about various solutions to solve my skin discoloration. Among them, I found a simple ointment.

I'm asking because I've heard that skin discoloration can be improved with just ointment. Is it a permanent solution? And after improvement, do I just need to apply sunscreen?