SEO is the practice of improving and promoting a website in order to increase the number of visitors the site receives from search engines - aka marketing in the 21st century. There are many aspects to SEO, from the words on your page to the way other sites link to you on the web. Another piece of marketing is how you have your page setup in terms of words, links, and format. Another layer of marketing involves your content is meta tags and rich snippets. Those two help search engines decipher what you are providing. In the old days there were desktop computers. Then came laptops. Nowadays there are all sorts of mobile devices too, many of which are more powerful than those computers that sat on a desktop years ago. Can your web site or blog be easily read by a mobile computing device? And the layer after that is social marketing. You want your web site to be plugged into networks so people can find you more easily. Remember when Google was just a search engine. Today, Goog...