To install the Glyphs.co script, you will need access to your site's HTML files or templates. If you've never looked at HTML before, ask your developer (or good developer friend) to help you. At this time, we recommend knowing at least a little bit of HTML to use Glyphs.co, as we do not yet have any Widgets or WYSIWYG editors.
Each Kit has a custom URL, you can find this by editing your kit preferences. If you have beta access, at http://glyphs.co/icons/ you'll see a top bar that either says My Icon Kits or the name of your selected Icon Kit. Clicking on that will reveal your current kits.
After you click on the Kit you're working on, there's a gear button on the right that will open up your kit preferences panel. Copy the Kit's URL from there; it should look something like this:
Paste this script inside the <head></head> tags in your site templates or HTML files. We recommend doing so right before the closing </head> script or after your CSS calls.
From here, your Glyphs.co kit is installed on your site. You can now add icons to your kit, and then use their code snippets to place them wherever you'd like throughout your site and style them however you'd like.