A hamburger menu is a small icon that is generally three horizontal lines representing a menu. It came into primary use when mobile responsive websites started happening. We use them on every site — we’ll have a text menu on a large screen, and when the screen gets smaller and there’s not enough space for all those words, it changes into a smaller icon.
When we say “menu,” we’re referring to the tabs at the top of a website that lets you navigate to different pages. A large percentage of people using the internet are using mobile devices, so hamburger menus have become very common. Using a hamburger menu eliminates the clutter of having a bunch of words on a mobile responsive website.