Site name and description in Google listing

[bparkerdesign]

I want to change the name and description that come up for my site in google. I can change the individual page names in page properties, but how do I change the name and description of the overall site? I want to change the heading in blue:

[fotoroeder]

Page names and Page properties do the job.

You may watch: 5 Essential SEO Tips for Adobe Muse Sites | MuseThemes ... - YouTube​

or / and:  https://musewidgets.com/collections/tutorials?page=2​

Best Regards,

Uwe