Only You Can Convert Sales

We do specialize in driving traffic, SEO, social and article networking but only YOU can convert sales.

Over the years I have heard complaints about people spending so much money on marketing and not getting any sales.  The traffic is there, the product is great and they even put the time and effort into blogging and article marketing.  Sometimes they even go the extra mile and actually pay an online marketing company to drive more traffic, yet still the same results.  So these site owners continue to rack their brains as to what could possibly be the cause of such results?  Or should I say, lack of results?