Welcome to the Q&A Forum

Easy! Just build 10,000,000 backlinks with the anchor text "Cut Throat Razor"

Actually - don't do that.

Read these:

http://moz.com/beginners-guide-to-seo

http://moz.com/blog/how-to-rank

Have a look at these:

http://www.cleanedison.com/order-generic-cialis-online.html

http://www.cleanedison.com/cialis-price-increase.html

Has your site been hacked?

I'd say that SEO skills allow you the segment the customer base more effectively, by understanding different customer groups, what keywords they use, and how they interact with your content.

A social media campaign needs to be targeted at a particular customer segment. The deeper your understanding of that segment and their information/entertainment needs, the more effective the social media campaign will be.