This domain name is well suited to a media, e-learning or business organisation.
The word "HeyBrain" contains eight letters and just two syllables. Two syllable names make popular global brands. Two syllable names are used by established brands like Gucci, Gillette and WeChat.
Heybrain.com is a .com domain. Dot com domains are the most valuable top-level-domain in the world, famously used by websites like facebook.com. When you own a .com, it is much easier to rank for your own name in search engines.