If you look at any major search engine, you see two different types of results displayed on search engine result pages for any popular keyword – paid results and organic results. Organic results are generated based on complex ranking algorithms which differ from search engine to search engine. Rankings for any particular site could be improved through thoughtful and skillful SEO campaigns. Paid Search Marketing (or Paid Search Optimization) is responsible for the placement and optimization of paid results. Paid results could be displayed not only on SERPs (search engine results pages), but also on any other site that agrees to be a part of search network and displays relevant advertisement. The task for paid search marketing expert is to figure out how to use company’s budget to get higher conversions and ultimately higher ROI by optimizing ads and landing pages and testing ad placement on all those properties. The Difference between SEO and SEM (full post): http://bit.ly/n9DRly http://amplify.com/u/a1dbc6