To install a theme:
www.yoursite.com/admin/customize/themesor via the UI head to Admin -> Customize
Click the Import button
- Select “From the web”
Enter the URL of the theme as described on the theme: for example
Once done you will have your theme or theme component imported. You will be able to check for updates and update the theme using the UI.
Note: imported theme components don’t do anything until you add them to a theme. If your newly imported theme component “isn’t working”, first check that you’ve added it to your current theme.