Go to Squarespace

Select Settings on the bottom left of your dashboard

Select "Developer Tools" and then select "Code Injection"

Find the "Header" text box and copy and paste the following into the top of the text box

Click "Save" and then "Publish"

Select "Verify Pixel Installed" on your Adwin dasboard and if the steps are done correctly, you should be able to move on to setting up conversion events.