The Konami Code is a "cheat code" that appeared in many of Konami's video games going all the way back to 1986. Konami JS allows websites to add their own easter to be triggered by their users by entering the Konami code key press sequence: "up, up, down, down, left, right, left, right, B, A".
Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.
Sites who has this tag are verfied by google to use WebMaster tools
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".