As per Google’s definition
“Dynamic remarketing lets you reach your past site visitors with ads that show the specific products people viewed on your site. Once you’ve set up your dynamic remarketing campaign, you’ll need to add the dynamic remarketing tag, including custom parameters, to your site so your lists can start working”.
You can generate the remarketing code for your website from your Google account. Once that is done I will then install the module on your website which will fill up the values as per Google’s standards and you will start seeing your lists getting populated. Check out the code in action on the e-commerce website I have uploaded for this purpose.