Unlimited data refers to a mobile or internet plan that allows users to access the internet without any restrictions on the amount of data they can use. This means you can stream videos, browse social media, and download files without worrying about hitting a data cap. It's especially beneficial for heavy users who rely on their devices for various online activities. However, some unlimited data plans may have a "fair usage" policy, which means that after reaching a certain threshold, your internet speed might be reduced. This ensures that all users can enjoy a stable connection, even during peak times. Always check the details of your plan to understand any limitations.