What does the yellow star next to my user name mean as a buyer?

[spirited19612012]

As a buyer, what does the yellow star mean that is next to my user name? 

I am new to eBay as a buyer, and I am learning how the process works so if anyone would let me know that would be great.

spirited19612012

[trekkiebigtime]

These reflect your feedback score. As you buy or sell and get more and more feedback, your picture will change