Let’s talk further about SEO vs SEA so the code word for search engine optimization is SEO. It is a catch-all phrase for everything you do to ensure your website appears higher in search engine results pages (SERPs) like Google. On the other hand, Search Engine Advertising (SEA) is centered around advertising. When you use search engine optimization (SEA), search engines display advertisements for your company above the organic results. Of course, both internet marketing strategies aim to increase website visitors. Based on the statements above, it appears that SEA is an additional cost, while SEO is free. But the distinction is not that simple.