A hamburger menu is a small button, usually three stacked horizontal lines, that opens a hidden navigation panel when tapped. It is the most common way to fit a full set of links into the cramped space of a phone screen. The lines have become so familiar that most people know to tap them without any label.
Think of it like a folded map in a glovebox. Everything is there when you need it, but it stays tucked away until you reach for it, keeping the dashboard clear. That trade is the whole point: you free up screen space at the cost of one extra tap to reveal the menu structure inside. On larger screens a mega menu or a visible bar often serves people better, since the links are right there.
The catch is discoverability. Anything behind the hamburger gets used less than a link shown in plain sight, so it pays to keep your most important destinations visible and reserve the menu for the rest. Clear labels and a sensible order inside matter just as much as the icon itself.
One small fix often helps a lot: pairing the icon with the word “Menu” measurably raises how many people tap it, which is why apps aimed at older or less technical users frequently add the label. It is also worth making the button itself big enough to hit comfortably with a thumb, around 44 pixels, so people are not poking at a tiny target while walking down the street.
At TopDevs we reach for the hamburger on mobile but keep primary actions on screen, so people never have to hunt for the thing they came to do.