Bounce rate is just too high. typically it happen that individuals area unit visiting your website however going away before the analytic code dead (I am unsure how briskly your site load however clearly it's associated with your high bounce rate from the ad). therein case, facebook record click knowledge however analytics dont. attempt to build your web site load quicker than without delay to create positive trailing code execute properly. however most vital issue you must fix is bounce rate, do thereforeme revamp on webpage to cut back it so those who area unit click keep until the code execute. Also, ton of individuals has javascript blocked in browser that resist analytics code to execute. each higher than problems may be a reason for such variation (However, they're going to not be same (FB and G), as they use completely different technologies for tracking)