1. From Customize section, go to Site Identity.
2. From Site Identity, you will be able to add various options related to site identity like:

• Logo: It changes the main logo of the site.
• Site Title: It changes the main site title of the site.
• Tagline: It changes the tagline (i.e: Description) of the site.Just below the site title.
• Display Site Title and Tagline: This enables/disables the site title and tagline from the site
• Site Identity Extra Options
  • Hide All: If you don’t want to display anything in the header then click this option.
  • Show All: If you want to display the logo title tagline in the header then click this option.
  • Title Only: If you want to display only the title in the header then click this option.
  • Tagline Only: If you want to display only the tagline in the header then click this option.
  • Logo + Title: If you want to display the logo and title in the header then click this option.
  • Logo + Tagline: If you want to display the logo and tagline in the header then click this option.
• Site Icon: The Site Icon is used as a browser and app icon for your site. Icon must be square and at least 512px wide and tall.