To set a favicon go to website settings and upload your own favicon by clicking on the upload button.

A favicon is an icon associated with a particular website or webpage. A web designer can create such an icon, and many recent web browsers can then make use of them. Browsers that support favicons may display them in the browser's URL bar, next to the site's name in lists of bookmarks, and next to the page's title in a tabbed document interface.

Here is how to set a favicon:

Step 1:Click on the gear icon. 

Step 2: Click on website settings.

Step 3: Under the General Settings tab you will find the favicon option in the right column. Click on upload button to upload new favicon (in red). 

Step 4: Click done.

Note:The favicon you want to upload for your website must be in.icoformat and the size should be 32x32 or 16x16.