A Wi-Fi router is a device that allows multiple devices, like smartphones, laptops, and tablets, to connect to the internet wirelessly. It acts as a bridge between your internet service provider and your devices, sending and receiving data through radio waves. This means you can browse the web, stream videos, and play games without needing to plug in cables. Most Wi-Fi routers come with various features, such as security settings to protect your network and the ability to manage connected devices. They can also support different speeds and ranges, making it easier for you to enjoy a strong internet connection throughout your home or office.