You prefer to read... You need to start by analyzing the SERP to understand the difference between SEO and SEA (Search Engine Results Page). When an Internet user performs a search on a search engine (Google, but not only), he can access two types of results. At the top and bottom of the SERP, it will find paid ads - or sponsored links - which are marked with a small green logo marked "ad." On they will find various types of organic or natural results on the rest of the article (free ads). The natural results are the result of the ranking carried out by the secret algorithm of the search engines while the ads are the result of a game of auctions paid by advertisers. What is SEO? The SEO for search engine optimization, is a method of optimizing a website to allow it to be better referenced on a keyword or group of keywords given. This method therefore aims to improve the site so that it can best meet the requirements of search engine algorithms. A well referenced s...