I am trying to evaluate efficiency of my FB ads, so I implemented conversion tracking with FB pixel. Basically, I created custom conversion FB pixel and embedded its script in the PHP page associated with my custom conversion (i.e. "Request more information"). Am I doing this correctly? Should I install the pixel (or rather embed its script) only in the page that is associated with the conversion? I can see the number of website clicks (from the ad) in the FB Ad Manger, so if I have the number of conversions for the same period, I can easily calculate the conversion rate... Is this correct approach?