Welcome to zner,
Imagine reading your name on this blog instead of the regular welcome message. Wouldn’t it be nice if the websites intuitively know what you want and show you results based on your previous data? For instance, if you are a startup entrepreneur, you visit a website for advice and it shows you only advice related to startups, sidelining all other articles, you would save a lot of time in searching through the articles. This is personalization.