This document provides guidance on using Twitter for libraries. It recommends starting with a strategy that identifies the purpose and goals of the library's Twitter presence. Key aspects include following relevant users, using hashtags to expand conversations, responding to questions, and amplifying community voices rather than just promoting the library. Tools and tips are provided for setting up accounts, tracking engagement, and integrating Twitter into the library's website and other online activities. Resources for further reading on using Twitter for libraries are also included.