A class action lawsuit is an action in which a large group of people files a complaint against the defendant for similar grievances. In this form of legal action, the lawsuit is filed on behalf of everyone in the class, that class being a group of people who share similar circumstances, injuries and damages. To be part of a class action, the plaintiff must show that his experience with the defendant is similar to that of other people in the class. Plaintiffs must also show that the evidence against the defendants is similar for everyone in the class and that individual lawsuits against the company would not be an efficient use of the court's time, nor would it be cost-effective. Finally, the individual compensation from the class action must be small enough that it is not worth the time or money to hire an individual attorney.