Google, as both a search engine and as a brand, has established and maintained its reputation for validity and trust, standing firmly behind the relevancy of its search results. Because Google does a good of job of weeding out spam and theft, readers tend to turn to Google first for online searches. That's where the importance of Google Authorship comes in. Since Google is a trusted brand, your online presence on the search engine will both increase your visibility and enhance your authority.
The ability to link content to one's Google+ account will be an incentive for authors to write exceptional work in order to increase their visibility and authority. Because Google+ is also a social networking site, its other users will link to the author's work, helping to drive traffic to the content and increasing authority further.
This is a great opportunity to practice search engine optimization (SEO) by using keywords when writing with Google Authorship, again producing an increase in rank, reputation, and visibility.