Marketo Munchkin allows you to track email clicks and web page visits. With Tag Manager, you can set this up in a hassle-free way.
In Marketo account go to Admin, click Munchkin in the tree on the left and select Asynchronous for Tracking Code Type.
Copy the Account ID and go to Tag Manager to configure the tag.
Once you have completed entering the tag information, select the trigger corresponding to the landing page where you would like to fire the tag or create one if it doesn’t exist already and click Save.