For WordPress websites, we highly recommend utilizing the WPCode headers and footers plug-in
Required Code for Embedded Experience: In order for the embedded experience to work the below code needs to be added to your site only once. We recommend placing this just before the closing <body> tag (in the “Footer” section of the recommended plug-in locations).
Code for Embedded Experience
To use the embedded experience, you will need to visit Settings > Linking: Below the link preview are 2 code options. For the embedded experience, you will use the second option, Required Code for Embedded Experience, outlined in a yellow box. (Note: The individual link is derived based on your selection from the Products dropdown on this page.)2
Add the provided script/required code line to your website (preferable at the bottom, before closing body tag).