To use Script Manager you need to use your custom domain. If you do not wish to use your custom domain, replace steps 2 and 3 with the instructions in this article.
Step 1: Login to Unbounce and open your landing page.
Step 2: Go to Settings > Script Manager and click on Add your script.
Step 3: From the drop-down, select Custom Script and give it a name (e.g: ReferralHero).
Step 4: Go to your campaign dashboard > Installation instructions and copy your Tracking Code.
Step 5: Select Head within Placement and All within Included on. Paste the ReferralHero Tracking Code and save the changes.
Step 6: Go back to your Unbounce dashboard and open your landing page.
Step 7: From the left sidebar, add a Custom HTML element.
Step 8: In the editor, enter
Step 9: Save your changes and the embeddable widget will appear on the page.