Virtual reference involves providing reference help to users remotely through chat or instant messaging. It offers synchronous help for users who cannot visit the physical library. Popular tools for virtual reference include Meebo, Trillian, and Question Point. Key parts of a virtual reference transaction include greeting the patron, asking questions to determine their information need, searching for and providing resources to help answer their question, verifying their understanding, and following up as needed. Librarians are advised to keep messages brief and frequent to maintain communication when helping patrons virtually.