Click Frenzy offers a UTM extension that can be added to the URL applied to each deal. 

We recommend using the 'Source/Medium' or 'Referrals' report in Google Analytics to view the traffic that comes to your site using this UTM. 

Some other platforms, like Shopify, may use their own analytics definitions to report on traffic coming to your site with UTM extensions - the support documentation relative to your platform should outline instructions for accessing this reporting