What effect does sunscreen have on the skin?

Prolonged exposure to sunlight can dry out and irritate the skin, but I tried using this for free trial Livihill Exosome Dermatological Sunscreen I was really satisfied. As someone with oily skin, I found applying sticky sunscreens in the summer stifling and unpleasant, but this product has a rich yet smooth texture that spreads easily. The finish is moisturizing yet matte, making the user experience excellent. In particular, it provides a natural tone-up effect, making it sufficient to use as a makeup base.

However, I suddenly became curious. What effect does sunscreen actually have on the skin? I would like to know if, in addition to UV protection, it helps with long-term skin health or prevents aging, or if certain ingredients could irritate the skin. I am also curious if the criteria for selecting sunscreen differ depending on whether you have oily or dry skin.

If any dermatologists or those with experience The effects of sunscreen on the skin It would be a great help if you could give me some advice on this.