SEOs don’t build websites; they build web presence.
SEOs don’t design websites; they make your website more usable.
SEOs don’t build links; they build relationships.
SEOs don’t socialize your content; they communicate your value.
SEOs don’t spam keywords in content to rank; they integrate key words into content to sell.
SEOs don’t sell your products/services; they help you attract buyers for you to sell to.
SEOs don’t drive traffic; they drive customers.
SEOs don’t create conversions; they make your website more conversion friendly.
SEOs don’t create your sales message; they improve it for your audience.
SEOs don’t write your business plan; they help fulfill it.
SEOs don’t manipulate Google’s results; they make Google’s results relevant.
Source : http://www.searchengineguide.com/stoney-degeyter/what-seos-really-do.php