There are three primary Wi-Fi bands in use today – the 2.4GHz band, the 5GHz band, and the 60GHz band. Each has its own advantages and disadvantages that make it more or less suitable for different applications.
The 2.4GHz band is by far the most common, due to its low cost and wide compatibility with devices and routers. However, it is also very crowded, which can lead to interference and reduced speeds.
The 5 GHz band is much less crowded but has a shorter range than the 2.4GHz band. It is also more expensive to implement than the 2.4GHz option.
Finally, there is the 60GHz band which offers extremely high speeds but at a very short range; it is typically used only in enterprise settings where reliability and speed are critical factors.