You need to create a gravitar. But what the heck is it? Well a gravitar is an avatar that follows you around on different websites/accounts you create which is based on your email address. A gravitar is a Globally Recognized Avatar… which is how the name came about!
Besides the branding benefits, which alone is enough, it also has somereally cool SEO benefits, if you set-up your account correctly. But the point is, you should have an avatar and to have to set it up once, and have it follow you around can be a time saving benefit as well.
Eitherway… if this description is to vague… well… then let the video do all the talking!
You can set-up you gravitar here for free: https://en.gravatar.com/