[quote="micas"]Please... experts out there, can someone explain to me how it works?
In simple language one can actually understand.
Wifi is essentially a system for transmission of data signals between computers and/or computer like devices over a limited range. The technology can therefore be used in homes, businesses and in compact public places to allow computers to connect to each other or to internet access facilities (usually know as routers) in the absence of cables.
Most laptop computers today and mobile phones such as the Apple Iphone
have built in wifi antennas.
One can also encounter WIFI signs in places such as motorway service areas. This usually means that if one has the correct access account one can use the short distance wifi facility to connect to the Service Area router and via that access the internet.