Knowing the difference between search engine optimization (SEO) and search engine marketing (SEM) is crucial in getting the best result on search engines.
SEO involves improving internal and external aspects of a website, to increase its organic visibility for search engines. SEO requires editing a website's HTML code and content to make it more search-engine friendly, and then promoting the Website to increase its relevance on the Web. For more information, see What is search engine optimization and why should I care?
SEM refers to how you advertise your website on search engines to increase your visibility in search engine results pages. Use SEM as an alternative and/or supplement to SEO. Common methods of SEM include: