Authorship provides validity and authority to readers and search engines alike, and is an ever-increasing measure of importance when it comes to search engine optimization and performance in the search results.
An author bio is a great chance to gain additional SEO value, and it’s a chance that far too many websites overlook.

Authorship is important in blog posts because it signals authority over the topic. Simply put, authorship is a trust factor for the end user experience, and this trust can be leveraged. Only certain content types apply for authorship, namely articles and blog posts. Authorship is a key indication of authority and trust that human users can use to gauge the validity of a piece of content. Authorship is still important, it just has to be thought about in a different way — author info may no longer appear on the search engine results page, but it still works to generate trust when a user lands on your page.

There are different ways to establish authorship for your blog posts. One way is to set up Google Authorship for your content. Authorship is assigned on a per-page basis. If you have a blog with multiple authors, you can connect the Google+ profiles of each of the authors to their own content. Another way is to add Google Author Tags to your blog for improved search results. If you have a single-author blog, you can establish authorship in WordPress by making sure you have an About page that describes who you are and what your blog is about.