What will happen if I sync photos

I want to put all my photos on my iPhone in my iTunes and on my laptop, do I click sync to do this? Also will all the photos be deleted? If I don't click sync, what do I do?

*Works for mac*
open iPhoto while you have your phone connected to you laptop and it should ask you if you want to sync your photos.
Then select the photos you want and sync them. After that it will ask you if you want to delete the photos from your phone.
Hoped I helped.