Free posted classified ads behaves like a mini Websites with full of information regarding your product, you cannot see any distinction between free classified ads and paid or featured ads. If your published ads become absolutely featured and qualitative, free ad then undoubtedly you may get a lot of traffic to your product. Even after posting of free classified ads, at the end of each add footage you may get an added feature like sharing add with different social networking website, so you'll be able to interact with other people who have an interest such as you in same field.