Each coworker get an unique robot avatar, which for example makes it easier to see who wrote a note on a company card. This will automatically be a robot, but you can change this to something more personal using Gravatar.
Go to gravatar.com and log in using your Google account or create a new account. Click "Manage Gravatars" and select the e-mail that should be linked to your image. This should be the e-mail address that you use to log in to Lime Go. Then upload your image.
You will then be asked to mark the image and confirm your selection.
It may take a few minutes before it is visible in Lime Go, here is an example of the end result.
Attached to this article are a few examples that you can use - saving you the trouble of searching!