Integrating a Third Party App to your Website can be done easily in the following steps.
1. Click on the Builder tab to the left and then click Website.
2. Click on Edit Site.
3. Add new section, scroll down and select Custom Code Snippet
4. Copy your installation code from your source.
5. Paste the code in the pop-up box
6. Choose the pages where you want your codes to.
7. Hit Save when done