Favorite icons—or favicons—are images that show up in a browser tab while viewing your site. It also shows up in the bookmarks if a visitor bookmarks your site. It's just one extra way you can make your site 100% yours!
To add a favicon for your site, click Customize Design in the section bar while viewing your Site, then click Design Settings.
Click the favicon option to pick the image you want to use.
Save your changes.
We recommend uploading a favicon that is 32x32 pixels in size.
Browser support for favicons varies, so not all favicon image formats and sizes will work reliably in all browsers.