It's concentrated THC, wax is one of the forms it's sold, has the consistency of a fruit roll up left out in the sun.. A "dab" is enough to knock you on your ass if you don't expect it.
Fan of them all.
Best tasting is bubble hash with an iron imo, not as strong, budder or crumble is the **** as well.
Hash and Concentrates | WeedPornDaily