What is the biggest advantage of Botox?

Lately, when I take photos with friends, I get self-conscious about my facial lines, and it feels like my facial expressions show more when I smile than before, so I’m quietly looking into dermatological procedures haha. Since I’m still a college student, I haven’t really tried all sorts of procedures, but I hear a lot of people around me talking about Botox.

But now that I've actually looked it up, I'm not really sure exactly what the benefits of Botox are. I've seen posts saying that getting it in the jawline refines the facial contours, and it seems like some people get it injected into their wrinkles. I'm also curious if the results are immediately noticeable or if the changes feel more natural!

If anyone has had Botox, please let me know what the benefits were. I'm curious if it's okay for a college student to try it for the first time, if it's painful, and if I can resume my daily activities immediately. I'm a bit scared, but if the results are good, I'd like to get a consultation!