People who've spent time recently on high school or college campuses will notice that students spend a considerable amount of time in the digital world on mobile devices. Students use them to get information, communicate, complete tasks, and are notified of important (or interesting) things.
Are you using QR codes in your admissions? If not, you should -- as they can supercharge engagement with your candidates. They're easy to use. They work well with mobile devices. And; one can get started without navigating the internet or typing a web address.