Heuristics applies to more than just the keywords that you use on your site. Heuristics also applies to web site usability, and a set of heuristic guidelines for site usability was first established by Jakob Nielsen in 1990. At the time, he developed a list of 10 items that when included in web site design would make a site more usable for individuals. Read More here: http://onlineseoclassroomforbeginners.blogspot.com/2015/03/heuristics-and-site-usability.html
https://social-media-strategy-template.blogspot.com/ What is a KPI? - KPI stands for Key Performance Indicator. The clue about its use is in the title, it is a KEY performance indicator, not an ordinary one. KPIs are used to monitor the health of a business and how well the business is tracking to its strategy.