Self-tutoring about web effects: the tutor mentions mirror text. Hello, world! I’ve been told being able to write so you can read it in a mirror is a rare skill. Well, CSS has you covered, with transform: scale(-1,1) Source: stackoverflow.com

Self-tutoring about web design: the tutor mentions the term void element. void element: An element that contains no displayed content. Rather, it contains information, in the form of attributes. The link and meta tags are examples. Source: w3.org