WiFi comes in two flavors 5ghz and 2.4ghz, but many do not
know the difference.
2.4ghz travels father
and penetrates walls and other objects better but is not as
fast as 5ghz. Many more devices use the 2.4 ghz band, like
baby monitors, RC toys, and Xbox controllers.
5 ghz has higher
speed, shorter range, and lower penetration through walls and
obstacles. It also allows for more throughput.
Bottom line, if your
device is close to the router or the router is in the open
rather than hiding in a niche of your house, 5 ghz is better.
Incidentally, 5ghz
should not be confused with the new phone 5G and 5G LTE
networks, which use much higher frequencies in the 30 ghz to
300 ghz range. It has the potential to be 20 times faster
than 4G, meaning you can download things 20 times faster or
download more data in less time.