A travel adapter simply lets you convert 1 style of electrical plug into another. There are 15 different plug types used in the world with an array of prong types. Different parts of the world will use different voltages and that is where a converter differs from an adapter. If you are using a low voltage device in a high voltage socket, chances are you’ll blow the device. A converter will convert the voltage so it’s safe. Most devices and chargers will either be multi-voltage or have a toggle to switch between voltages but it’s best to check before you travel abroad.