Wifi Version Numbering
The WIFI industry decided that using actual proper names for WIFI standards is "too complicated" for the vast majority 0f people in 2018 and re-branded all the standard named everyone knows to simple numbers. As an exmaple, Wireless 802.11n is with the simple numbering system just "Wifi 4".
Actual Wifi-standard names and simplified names
Using the "simple" numbers may seem foolish from a technical perspective. However, those are what modern mobile devices indicate which means that most people will simply see a number on their display and judge the network connection based on how high it is. Knowing what the simplified numbers actually mean is therefore a good idea.