Hi, just a quick note to tell you that I appreciated reading your article.
What is Expertise?
Expertise points are tabulated based on community ratings. An upvote on a question or answer earns 10 expertise points for the contributor. A downvote results in a loss of 2 points. Community rights can be earned as expertise points are accrued.
What are Contributions?
Contributions are based on updates made to articles, questions asked and answered, and comments.