Use the logo options to display your logo with an image, text, or both in the header navigation bar. You can also use the customizer to set the logo image as well.
Using text for the logo
If you would like to use text for the logo, you can change the Site Title using the customizer by going to Appearance > Customize > Site Identity or by going to Settings > General.
You can also hide the text if you just want to use an image instead by going to Appearance > Customize > Site Identity and uncheck the “Display Site Title and Tagline.”