Mobile data refers to the internet connection that allows you to access online content using your smartphone or tablet when you're not connected to Wi-Fi. It works through cellular networks, which transmit data over radio waves. This means you can browse the web, stream videos, and use apps while on the go, as long as you have a mobile data plan from your cellular provider. When you use mobile data, it typically comes in limited amounts, measured in gigabytes (GB). Once you exceed your plan's limit, your connection may slow down or incur extra charges. Understanding how to manage your mobile data can help you stay connected without overspending.