The objective of the profile image is to help Google determine the quality of a site’s content through the reputation of its author; Google knows that great content comes from great authors and that users are more likely to select content that they can see is written by a highly trusted/reputable author; therefore Google wants to show your image as a sign of trust.
In order to have your Google profile image be displayed on search results, you will first need to implement an authorship markup on your website or on other websites where you contribute content to, and to confirm your authorship by including a reciprocating link to those websites from your Google profile. *
Here are some steps on how you can implement Authorship markup on your site:
Your articles on your website should all link to your “author page” using rel=”author” – HTML5’s version of link relationship for authors.
A link to your Google profile from your author page must be present and use the XFN link attribute rel=”me”.
Your Google profile should link back to your author page to confirm ownership of the site. You can check the “this page is specifically about me” checkbox for it to create a rel=”me” attributed link to your site’s author page.
Practice Head (QA / Software Testing)