Adding third-party apps or javascript to your pages is very simple.

To add scripts globally for your site or pages click on Website Settings -> Custom Code

If you have a code that starts and ends with <script></script> you have to add in the Custom Head Markup or Page Head Markup

This is useful if you decide to add a chat widget on your website to be able to answer customers questions.

Click on the Save button at the bottom and preview your site to see the script in your page.

To add script inside your page on a specific place, use the Code Widget from Add Widget -> drag and drop the Code Widget anywhere on your page.

Insert the script that starts and ends with <script></script> and save the page.