Search engine optimization or Search Engine Optimization (SEO), is a process of increasing (favoring) the visibility of websites in the search results of a search engine.
SEO is a subcategory of SEM online marketing which represents all the techniques by which a website is propelled above in the list of results given by a search engine for certain relevant keywords, thus increasing the site traffic and the experience offered users.
Search engines have a precise algorithm by which they "choose" the order of the pages for certain searches, depending on their relevance and / or the authority of those pages. The principle behind indexing is simple: which sites help the user with this search
If online promotion refers to paid campaign optimization services (PPC and / or display campaigns), SEO optimization refers to the increase in organic search. Organic positions are basically the "recommendations" made by search engines. Online promotion campaigns can propel a website in the short term in the top positions, but by choosing SEO optimization you can bring relevant long-term traffic to your page, as it continues to have results long after your investment in this channel stops.
You should keep in mind that the results of the SEO optimization process are obtained 6 to 12 months after implementation, with a gradual increase and provided that the process is constantly supported, through corrective measures when necessary.