Site Name can be added in the back-end console under Theme Settings >> Global Settings.

sitename1.png

For mobile it will appear on top bar. Make sure it is not too long or it will be cropped out. If the site name is left blank, there will be nothing here.

sitename2.png

For desktop it will appear on browser’s tab. If the site name is left blank, it will show website link instead.
Site Description and Site Keywords are not the design but SEO.

sitename3.png

Did this answer your question?