A Jupiter Media study found that 5 out of 6 commercial purchases came from the organic search results versus paid ads.

Organic vs PPC vs Paid Inclusion

Many search engines had to find new revenue streams as the dot com bubble burst and targeted pay per click text ads provided that stream.

Yahoo! also has a paid inclusion program which is said to ensure coverage but not to have any effect on relevancy. Listing in their paid inclusion does get your site a human review though, so it may help improve your relevancy scores some. Read more…