To add an add-on to a page
Classic Website Editor
Go to Website at the top and click Manage
Either Create a New Page or Edit a Page
Choose the Add-on you want to add to the page in the Page Settings section
If you have not set up the Add-on yet, you can click 'Manage Add-ons' to enter in the appropriate information:
Click Save
Website Builder:
Go to the Website tab and click Builder
Select the page you want to edit from the list of Pages at the top
Click the dropdown arrow beside an Add Content button
Choose the Add-on you want to add to the page
If you need to edit the Add-on click the Manage link after you've added it
Save Draft or Publish