SEO is short for for search engine optimization. It is a combination of techniques that will increase the authority of your website in the search engine results for the searchers who are looking for your product or service via search engines like Google, Bing, and Yahoo.
Organic results typically show up below a few paid results in the search engine result page. Organic results are free results that are chosen by the search engines algorithm as the most valuable result to the searcher for their keyword they are searching for. Paid results typical show at the top and right side on the results page. These results are paid for by advertisers to show up for the keyword searched for. Surprisingly the organic results are clicked on far more than paid results.