The Diablo 2 Wiki archive is available for anyone looking for information on Diablo 2. All information here is pre-D2R but contains a lot of useful information that is still relevant. Updated sections for new D2R features can be found on the PureDiablo Diablo 2 section
Cold is one of the elemental attacks found in Diablo II. Its main strength is freezing enemies and slowing them down, making them easier to dodge, or making them attack slower, and there fore enables you to take less damage.