In roller derby, a jammer is a key player on the team whose primary role is to score points. Each team has one jammer on the track during a jam, identifiable by a star on their helmet. The jammer's objective is to lap members of the opposing team, and they score points by passing them. The game consists of two teams consisting of blockers and jammers, and the jammers must navigate through the blockers to reach the back of the pack and break through to earn points for their team.

"Jammer: The Making of a Roller Derby Queen" centers on the journey of a character named Ava, who aspires to become a roller derby queen. The film explores her challenges, personal growth, and the vibrant culture of roller derby. Ava's determination and passion for the sport drive the narrative, highlighting the camaraderie and competitiveness of roller derby. Through her experiences, the film showcases the empowerment and resilience found within the roller derby community.

In "Jammer: The Making of a Roller Derby Queen," the depiction of roller derby may suggest varying levels of compensation for participants. Generally, roller derby leagues can be amateur, semi-professional, or professional. In amateur leagues, skaters typically do not receive a salary and may pay fees to participate. In semi-professional or professional leagues, skaters may receive a stipend, bonuses, or a salary, depending on the league's structure and sponsorship. Many skaters also rely on merchandise sales and fundraising to support their teams.

In the movie "Jammer: The Making of a Roller Derby Queen," the famous roller derby woman featured is "Sister Mary D. Pains." She is portrayed as a key figure in the roller derby scene, showcasing the sport's unique culture and the personal journey of those involved. The film highlights her experiences, challenges, and triumphs within the roller derby community, emphasizing the sport's empowerment and camaraderie among its participants.