The single purpose of a class action litigation or lawsuit is to give the average person a chance to take on some of the biggest private companies and corporations in the world; giving the individual person a chance to address any wrongs done by any of these major entities.
You should not attempt to handle this sort of case on your own, without the help of an experienced attorney. The process can be overwhelming and extremely frustrating, but class action lawsuits give the average person the opportunity to hold these companies accountable, by grouping together hundreds or sometimes even thousands of people, within one lawsuit. This gives the legal case a higher level of credibility, and demands that the defendant pay attention.
For some victims involved in class action litigation or lawsuits, this is the only meaningful way for them to address fraud, widespread discrimination, or other similar legal violations. You can look at cases of class action lawsuits against major car companies and major tobacco companies, in the past, and understand how class action litigation can help.