SAT result

I just saw my June SAT result and I am in a really weird situation right now in which I don't know what I should feel about it. My score is within the range of my expectation, but I feel that it could have been better, especially because I got lucky on the writing section and still got an expected score. And then now I am wondering why I would care so much about this SAT score. I have been told that it would be a really important component of my college application, yet I also question the reason behind. Why would the colleges care about some minor differences in terms of the SAT scores among their applicants. I have heard that colleges would also value your extracurricular activities and weigh them almost as equal as your standardized test. Yet people around me have told me the otherwise. Now I am aware that I am worried about my college application partially because of a lack of direction. I do not know what I should do, or what I can do to most effectively use my time to help my credentials. And now I am also asking myself why a college acceptance would be able to affect me so much to a degree that almost all of my choices have to do with it.