Cliff Holsenbeck | Source | Senior Director of Product Management at iconectiv

Trump uses a short code – 88022 - that is memorable, Hillary's is harder to remember – 27246 – which spells out HRCGO. That initial interaction is a little bit different. But once you've signed up to receive mobile messaging, the interaction is pretty consistent.

The big thing about shortcodes is they're trusted and secure. Any short code campaigns that are launched go through a vetting process through the wireless carriers, which weeds out a lot of potential unwanted material.