If i restore my iphone via ITunes, everything will be put back on it from back up?

I want to restore my iphone due to some problems i'm having but i wanna make sure i won't be losing anything. I backed it up to itunes, so where do i go from here? Do i do a factory reset and when its done, will it give me the option to use backup to put everything on my phone? I'm having a hard time understanding this and i don't wanna lose anything

When you plug the phone in after the restore you would be given the option to set it up as new or restore from that backup.