How to predict or to know that conversion tracking is working correctly?

 There are so many techniques. One of the approaches for this is to utilize the extensions. The Google Tag Assistant for Chrome is easy to use and also to understand. It’s not perfect but it does quickly alert the issues that are worth digging in near future. There is also a Google Analytics Debugger extension that provides a similar kind of service by focusing on GA tracking. In a Similar manner recently Facebook has rolled out the Pixel Helper extension, which helps to aid in diagnosing tracking for the Facebook.