Comparing SEO & SEA

SEA (Search Engine Advertising) or SEM (Search Engine Marketing) are synonyms for paid internet marketing. How do those techniques relate to SEO ?

• SEO will cost you time and sweat to implement, SEA will cost you money (paying Google or Bing or others...)
   
• SEO will achieve its result with a slow ramp up – as your website will slowly achieve a better ranking. SEA will have an immediate effect, as soon as you activate your campaign.
   
• SEO will cost you sweat: quite some work has to be done to construct a quality website, have the link building, have the required change. Setting up an add in SEA is quite easy to achieve.
   
• What you achieve with SEO will last for quite some time. SEA will give you a temporary result: stop paying, and it fades quickly away.