For branding you may wish to add a square icon in the tab of viewers browsers. This is called a “favicon”.
Accessing the customiser
First you will need to access the customiser in the admin bar of the website. Further details are available here.
Adding your icon
Navigate to “Settings > Site Identity” and you will be able to see a “Site Icon” section.
Click on “Select image”, and upload your square icon image ensuring it meets the guidelines provided.
Then press publish.