Here you can specify the name of your site and the Tagline. Also you can upload your logo set it’s width and upload the favicon.
To open the customizer go to Appearance > Customize.
Dark Logo:
Upload logo for light background. Use .png format with transparent background. The recommended width should be at least 220 pixel for normal and 440 pixel for retina screens.
Light Logo:
Upload logo for light background. Use .png format with transparent background. The recommended width should be at least 220 pixel for normal and 440 pixel for retina screens.
Header Logo Width:
Change the width of the logo, the maximum allowed size is 220px.
Footer Logo Width:
Change the width of the logo, the maximum allowed size is 140px.
Site Icon:
The Site Icon is used as a browser and app icon for your site. Icons must be square, and at least 512 pixels wide and tall.