This represents your current experience. It calculates by analyzing your connected repositories. By measuring your skills by your code, we are creating the ranking, so you can know how good are you comparing to another developers and what you have to improve to be better
Information on how to increase score and ranking details you can find in this blog post.
I am trying to make life easier for myself and others by making changes to open-source projects, and I myself am a developer of open-source solutions.