1. From Customize section, go to Header > Site Identity.
2. From Site Identity, you will be able to add various options related to site identity like:
- Logo( Only available in WordPress version greater than or equal to 4.5 ): It changes the main logo of the site.
- Site Title : It changes the main site title of the site.
- Tagline : It changes the tagline of the site.
- Display Site Title and Tagline: Enables/Disables the site title and tagline from the site
- Site Icon : The Site Icon is used to set fav icon for your site.Icon must be square and at least 512px wide and tall.