This refers to a set of data that determines what kind of website it is and helps increase the weight of certain keywords. This can also help you summarize information better, and give you a clearer and more concise look into your data.
Sean Si is a Filipino motivational speaker and a Leadership Speaker in the Philippines. He is the head honcho and editor-in-chief of SEO Hacker. He does SEO Services for companies in the Philippines and Abroad. Connect with him at Facebook, LinkedIn or Twitter. Check out his new project, Aquascape Philippines