What is the difference between WiFi 2.4G and 5G?

The difference between WiFi 2.4G and 5G

2.4g has good penetration and long transmission distance. But the interference between devices is relatively large and the transmission speed is relatively slow

The 5g transmission rate is high. Less interference. The only problem is poor penetration (it won’t work above a wall)

So try to use 5G when you have a 5G signal at home, and 2.4G for places with poor 5G signals. The current smart routers generally have the function of switching between 5G and 2.4G, and you generally don't need to worry about it.