Wi-Fi is a technology that allows devices to connect to a wireless local area network (WLAN) using radio waves. It enables devices such as smartphones, laptops, tablets, and other devices to connect to the internet without the need for a physical wired connection.

Wi-Fi networks are typically set up using a wireless router, which acts as a central hub for connecting devices wirelessly. The router is connected to an internet source, such as a modem, to provide access to the internet for all connected devices.

Here are some key points about Wi-Fi:

1. **Wireless Standards**: Wi-Fi technology is based on various IEEE 802.11 standards, such as 802.11n, 802.11ac, and the latest standard, 802.11ax (Wi-Fi 6).

2. **Security**: It is essential to secure your Wi-Fi network with a strong password to prevent unauthorized access. Encryption protocols like WPA2 or WPA3 should be used to protect data transmitted over the network.

3. **Range and Speed**: The range and speed of a Wi-Fi network can vary depending on factors like the router's capabilities, interference from other devices, and physical obstacles like walls.

4. **Dual-band and Tri-band**: Some routers offer dual-band or tri-band capabilities, allowing devices to connect over different frequencies simultaneously for better performance.

5. **Mesh Networks**: Mesh Wi-Fi systems use multiple access points to create a single, seamless Wi-Fi network with extended coverage and improved performance in larger spaces.

If you have any specific questions or need more information about Wi-Fi, feel free to ask!