What kind of Traffic Source works for you in the best way? In terms of getting conversions.
For us the best traffic source will be traffic from organic search such as Google.
Google is unreliable so we use different types of PPC Campaigns to target audience for our products.
It depends on what we are targeting. And if you are trying to get conversions then I will go with Brian here. Google is way too much unreliable these days better stick to ad campaigns.