SEO measures, the entire site, page by page or through the different set points for each articles.
In the page information, and the current ranking of the keywords set in the "Search Term Setting", it is possible to grasp the number of pages that are indexed number of external links to the search engine.
Site TITLE set as sub wording to the setting of the page description set as keywords. A minimum setting on the site setting will improve the SEO of your website tremendously.
Besides setting the SEO Meta title, description and keyword for the entire site, you can have different setting to your page for SEO ranking.
META TITLE | META DESCRIPTION | META KEYWORD
You can also set specific/ different SEO meta title, meta description or meta keyword to a specific article which is different from the rest the site or other pages.