In early 2013, Google's CEO Eric Schmidt announced that people that are taking advantage of Google's Publisher and Authorship program were likely to rank higher than those that are not using it.
So you need to be on it.
Luckily, it's not that difficult to set up. Below is a free video that explains exactly how to set up your Google Authorship for WordPress.
If you like this video, don't forget to check out the entire WordPress SEO Video Tutorial Series!