What is best free or paid for traffic?

I interviewed a number of people and had 100s of responses to questionnaires I sent out. The results - the short answer is both.It is a good idea to have a free method and a paid for method running at the same time. One if slow and steady and the other is fast and explosive. (If done right of course)

Most people like a good tried and tested paid for traffic technique. One that's fast and that you know will work for your offer....