Following are the steps for adding an Opinion Stage item to your site:
Step #1 - Copy the Embed Code
To get the embed code, click on the Embed & Share button. From the dialog that is displayed, go to the “Squarespace” tab and click on the "Copy code" button.
Step #2 - Add the item code to your Squarespace site
Start by determining if you would like to add the item to an existing page or to a new one. You will notice a “+” sign on the top right side of the page you selected. Clicking it will display a drop-down menu.
In the drop-down menu select the Code option:
Paste the embed code you copied in step #1 above:
Click the save action on the top\left.
You're done!