Magento Commerce, 2.2.x
Creating a Tag to Track Conversions

If you have a Google AdWords account, you can create a tag that tracks conversions. The following example shows how to use both Google Tag Manager and Google Analytics to create a tag that fires on your store’s conversionA marketing term that indicates a goal has been reached. If the goal is to sell a product, conversion is reached when a visitor to your site becomes a buyer. “Success” page.