A Gravatar or Avatar is the little picture that shows up next to your comments on blogs. Setting one up is really simple, and it follows you from blog to blog, so you can look the same everywhere on the internet.
Here’s an example:
Read on to see how to make your own Gravatar in under 5 minutes:
1- Go to http://en.gravatar.com/ and set up an account with your email. Then upload a picture from your computer and crop it to the size you want. It asks you to confirm, and you’re done!
2- When you make a comment on a post, the important part is to enter the same email address that you used on en.gravatar.com (this is how they pull the info). That’s it! Post the comment and your image will show up.