What is a Favicon?
Favicons are small square images usually 16×16 pixels which are used by web browsers to show a graphical representation of the site being visited at the left side of the browser's address bar.
Adding a custom Favicon
1. EasyStore Admin > Themes > Customize > Favicon
2. Upload your favicon > Save
Note: The recommended image size is 16 x 16px
Hope this helps!