The search engine industry frequently innovates as do consumer behaviors for discovery and sharing. Those changes require search marketers to take a fresh look at what search engine optimization (SEO) is and why companies should or should not engage in its practice.
Defining search engine optimization is often focused on the mechanics:
“SEO considers how search engines work and what people search for. Optimizing a website primarily involves editing its content and HTML and associated coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines.” (Wikipedia).
Even Google offers a definition of what an SEO is along with guidelines: