Easy to brand domain name that includes the word "stack".
StackM has only six characters and only two syllables. Two-syllable names are extremely rare and exceptionally valued. Successful brands using two syllable names include Hilton, Starbucks and WeChat.
This domain was first registered in April 2016. Older domains have an advantage when ranking in search engines.
Stackm.com is a .com domain. Dot com domains are the most desirable top-level-domain in the world, famously used by websites like google.com. Once you own a .com, it will be much easier to rank for your own name in Google.