In the language of web design SEO is the acronym of "Search Engine Optimization" and "Search Engine Optimizer".
The term SEO means all those activities necessary to improve the visibility of a website on search engines like Yahoo, Bing and Google.
The Search Engine Optimization includes various best practice to insert into a website in order to get a good ranking (positioning) in the SERP (Search Engine Results Page).
In the work of the web designer / webmaster being a SEO specialist is a duty since any customer wants to have a site with the best possible SERP. Personally, I take care of this aspect with great passion, giving the utmost attention to every small detail that can be used, starting from indexing to positioning and maintenance, developing websites SEF (Search Engine Friendly).