Using automations to set phone on silent when on campus, how will it know when I'm on campus without me setting it as it didnt give me the option to set the location.

Hi fjhincarolina,

Welcome to Apple Support Communities. You can use Do Not Disturb to create an automation to silence your device upon arrival to a location. Go to Settings > Do Not Disturb > after turning it on, go to "Add Schedule or Automation". From there you will be presented the option to set locations for your device to silence when you arrive. Further details are listed here:

Use Do Not Disturb on your iPhone, iPad, and iPod touch

Let us know if you have any questions.

Have a great day!