If you want to generate traffic to your site then you should consider the PPC programs. The free traffic from search engine was the best source but PPC change that concept. In these days the free traffic concept is no longer exist because if you want to rank in the search engines you must get many backlinks to your site which will be costly. Pay per click is not like free traffic sources because you will get instant traffic without having to wait for long time until search engines give you free traffic.