- Removed the part that says " (but most boring)", because that is an opinion which does not reflect everyones' views. It should not be in a wiki.
Ground is possibly the easiest
(but most boring) position available to controllers. The basic responsibility is to get planes to and from the runway and terminal buildings as quickly as possible (to save fuel and time) and to avoid planes colliding with each other. For this, you'll need a GROUND SECTOR FILE. These are very detailed maps of a particular airport (can be downloaded from the Sector System on IVAO) which hold all the taxiways as geographic data (press F5 to view).
Depending on the airport, the taxiways may have letters, or descriptions (e.g.: Inner Taxiway) or each section of the airport may have a number (called blocks). At Heathrow, the last two are used, so a statement like 'taxi to block 76 via the outer taxi-way' would be valid.