Bailiffs are law enforcement officers who provide security and maintain order in the courtroom during trials and other court proceedings. Bailiffs may also provide other security services, such as escorting the jury out of the courtroom to ensure they do not have contact with anyone outside of the courtroom, and guarding the jury during sequestration (isolation) of the jury. Bailiffs may help maintain courtroom decorum by announcing the judge’s entrance into the courtroom, and by reminding all persons in the courtroom to turn off their cell phones and remain silent when court is in session.

In California, bailiffs are typically sworn peace officers whose primary role is to ensure safety and order within the courtroom. They are often deputies from the county sheriff's department or local police officers assigned to the court. Their duties include providing security, enforcing courtroom rules, and ensuring the smooth operation of court proceedings. Bailiffs are responsible for escorting judges, juries, and sometimes witnesses in and out of the courtroom. They also manage the sequestration of juries when required, ensuring that jurors do not have contact with outside parties that could influence their deliberations. Additionally, bailiffs maintain decorum in the court by making announcements, instructing attendees on proper conduct, and handling any disturbances. California law, through various statutes and the California Penal Code, outlines the powers and responsibilities of bailiffs, aligning with their role in maintaining the integrity of the judicial process.