Navigate to Appearance > Customize > Site Identity.
Logo
Use the ‘select logo’ button to upload your logo. In order for your logo to line up correctly, it is recommended to upload an image of 72px height and max 216px width.
Site title and tagline
Set your site title and tagline. The tagline is only displayed in the browser tab, not on the site itself.
Site Icon
Upload your favicon in the site icon area. Suggested size for your favicon is 512 x 512px.