Where can I get a shading tool and what is it?

Question: Where can I get a shading tool and what is it!?

lol!.!.!. ok I have a deviantart acount and people are always talking about how they used a shading tool, well!.!.!. i really don't know what it is!. i love drawing and i really wanted to try using a shading tool!.!.!. heh!.!.!. i feel stupid!.!.!.!. =/Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Photoshop and similar programs have various tools,Brushes,Burning and Dodging tools!.These can be used to shade in areas of pictures and photographs!.Www@QuestionHome@Com