This is really interesting! Have you considered using an attribution model to understand how your individual keywords are performing and improve your campaigns?
We’ve found that this approach provides marketers with accurate, granular information about the exact value of each and every keyword. And with this, it is much easier to know where to cut or increase spending! We managed to save a client 30% of their PPC budget without a drop in leads or revenue with this approach (take a look how here). For some more general information, click here, or drop us a message at firstname.lastname@example.org.