Surfaces?

Blitz3D Forums/Blitz3D Programming/Surfaces?

Can someone tell me in simple 'English for Eejits' what Surfaces really are. I understand, they 'hold' the texture, but when people go on about multiple meshes or triangles with a single surface, and bring Brushes and U's and V's into everything, I get ever so lost.

Please note:

a) I do not, and am unlikely to in the near future, own any 3D Modelling software.

b) I'm thick as two short ones

c) Spell it slowly!