Now on You Have Enter Levels on Fanpage Clients
How You know its the client is froom Facebook ADS?
See the screenshoot below

You Will find pre-defined level on this named
i. ad_id.23850365070240757
ii. messenger_ads
Now You have to add new levels on this basis on customer behaviour
If he/she Interested on our serviece then add those levels like
* usefull
* interested
* Relevent
* related
* domain
* hosting
If he/she Not-Interested on our serviece then add those levels like
* Not interested
* waste
* irrelevant