The Search Engine Optimization is essential in order for the search engines to be able to find your content. This is also the most fire-proof methodology to obtain organic growth of your digital marketing. From the domain to the text, from the keywords to the meta tags it can all be optimized. The Search Engine Marketing technique is a great complimentary practice and it refers to Paid-Per-Click ads which gain an online market for you each time the user searches through the search engines such as Google, or Bing (each of the big search engines has own ads service).