Semantic tags Semantic tags describes is meaning in human readable language. Looking at the tag we can tell what tag it is. for example: <header - represents top header content. <nav> - holds the navigation link. <footer> - holds bottom footer/copyright information. Non-Semantic tags Non-semantic tags tells us nothing about the content inside the tag. for example: <div> - A block level container used to group elements together <b> - to make the text or letter bold.