OK you fucking toys get your terminology straight.
A tag is just a quick throwup, like what dcrew posted, philco (which I think is legit, and you want your tag to be readable, so you can start gettin up)
A bomb is similar to a tag, but it's just bigger. It's bublle letter normally, and normally just 2 colors, sometimes has 3d shading
A piece is what that fable guy posted. that would take hours with a real can and on a real wall. If not days. Piece is short for masterpiece, meaning like a piece of art, not just a quick throwup (throwup=tag/bomb) Pieces are normally done in legal places, and tags/bombs aren't.
That shit fable posted was Ill. But anyone can draw that shit. Putting it up with a can is hard, trust me I'm still learning and aquring real can skills.
Philco and Fable, big ups for posting some shit. I am GERB. a re-arrangement of a few letters in my last name, but I really don't like it very much. I think I'm gonna switch it up soon, but Idk i already got a lot of tags up around my city saying gerb. So meh who knows.