This document provides information on becoming a trans ally by understanding cisgender privilege. It defines key terms like cisgender, transgender, gender identity, and transphobia. It explains that society privileges cisgender identities and marginalizes trans people through social institutions. Cisgender people benefit from unearned advantages in areas like language, gender authenticity, access to institutions, healthcare and finances. The document encourages allies to recognize their cisgender privilege, educate themselves, and support trans communities without feeling guilty.