Google worked better for me since people search with intent whereas on facebook you rely on serendipity. They are there for something else and you hope they wil

Google worked better for me since people search with intent whereas on facebook you rely on serendipity. They are there for something else and you hope they will have interest in your service. All in all are you sure you use the right keywords in google so you get the people with right intent? Facebook's strength is audience targeting. Are you sure the audience you target is the right one on Facebook?