Search Engine Optimization also known as SEO, is the process by which your website is optimized for higher search engine placement. There are many details involved when properly optimizing a website, but the basic optimization process pretty much boils down to 2 main ingredients; proper placement of keywords in the content and code of the website, and acquiring the proper links from other websites pointing to your website. Again this is a very simplified explanation but when properly executed SEO will boost your website's organic search engine ranking.