Happy brand name created for any product or service that brings u a "smile" to one's face.
The word "MissionSmile" contains 12 letters and three syllables. Successful brands using three syllable names include Adobe, Santander and Verizon.
Missionsmile.com is a dot-com domain. Dot com domains are the most sought after top-level-domain in the world, famously used by websites like youtube.com. When you own a dot-com, it is much easier to rank for your own name in search engines.