This brand name is related to the word "poster".
Postermo has eight letters and three syllables. Established brands using three syllable names include Sainsbury's, Toshiba and Heineken.
Postermo.com is a dot-com domain. Dot com domains are the most valued domain extension in the world, used by famous websites like twitter.com. When you own a dot-com, it is much easier to rank for your own name in search engines.
This domain was first registered in August 2016. Older domains have an advantage when ranking in search engines.