What is ground and why is the choice of ground important?

A ground is a ground and it grounds  us so we can ground the ground...

jk...A ground is a solid material built above the surface of the earth to keep the surface of the earth stady and to protect our feet from the surface  its natural effects ...ty:)im not quit sure tho but yah i think tgis is so ..pls reply to this ..tysm:)

answer///design;