Happy brand name created for any product or service that brings u a "smile" to one's face.
MissionSmile has 12 characters and three syllables. Successful brands using three syllable names include Vodafone, Adobe and Verizon.
Missionsmile.com is a dot com domain. Dot com domains are the most prestigious top-level-domain in the world, famously used by websites like youtube.com. When most people think of a website, they think of a dot com.