Authorship is a new way to connect your Google+ profile with content you author on other websites to boost search rankings. It works for expected topics like your expertise but can also strangely connect you to unrelated topics. Setting up authorship provides benefits like increased visits, credibility from being a real author, and backlinks from your content. To get started, create a Google+ profile and link it to the sites you contribute to by adding your photo and profile with rel=author tags.