Sync your iPhone, iPad, and iPod with iTunes using USB - Apple Support - https://support.apple.com/HT201253 - detailed example: https://discussions.apple.com/thread/4090536?answerId=18860187022#18860187022
Sync your iPhone, iPad and iPod touch with iTunes using Wi-Fi - Apple Support - https://support.apple.com/HT203075
iTunes 12 for Mac: Sync iPod, iPhone, or iPad - https://support.apple.com/kb/PH19458 - including manual syncing