CHEMICAL VS. PHYSICAL SUNSCREEN

Hello Everyone! I do not know a lot about sunscreen because I do not really wear one before. Then my sister told me that her co-workers in korea said that it is very important to wear sunscreen everyday even when you are inside the house so after that I opted to use sunscreen. I go for sunscreen with spf of 50+++ and higher but I am not yet aware of its ingredients or wether it is chemical or physical. Can you tell me the difference of the two as well as their pros and cons? I have a sensitive/oily skin by the way. As of now I am using this sunscreen from Innisfree.