Yep you can target by geolocation and by category. I've had great results with some landing pages for affiliate marketing product offers. If you aren't getting conversions stop what you're doing and invest one full day of your time to read a book on effective copywriting. There is a "magic wand" in internet marketing .... Knowledge is POWER. Don't blindly write landing page copy - it will NEVER convert like you're hoping. I don't care WHAT your traffic source is. I consider remarketing my best source of traffic, then my newsletters, then PPC. But the point is - you need to understand fully what drives someone to take action. Then you'll see your conversions skyrocket from ALL of your traffic sources. Mark my words!
