To install Saber on your Shopify Online Store, log in to your Shopify Admin area, choose
Online Store and then
Themes from the left menu.
Then click the big blue
Customise theme button.
Theme options >
Edit HTML/CSS from the top menu.
Now you need to edit the
theme.liquid file, in order to add the Saber embed code to it.
Scroll to the bottom of that file, look for
</body>, and paste your embed code just above that.
If you have a Shopify Plus subscription, do the same for the
checkout.liquid file to include Saber on your checkout pages.