AdRoll
AdRoll is a simple and powerful remarketing platform and this widget will place the code exactly where you need it. If you don't already have an account, you can sign up for one here.
Table of contents
How to use
Once you have created your account, locate a button labeled Smart Pixel.
This will open a pop-up and inside the popup you'll find the 2 codes that you'll need for the widget.
Paste the first code in the AdRoll ID and the second code as the Pixel ID.