Step 1: Head over to gravatar.com and create an account. It’s free to do so.

Step 2: Follow the instructions to add your image. Ensure you use the same email address that you will be using when you leave comments. It is the email address that will trigger your photo.

That’s it. It’s pretty simple really. Now when you comment on blogs that have gravatars enabled (like this one) it will automatically add your image, based on the email you use.