What is a plea bargain and why do some people oppose them?

I plea bargain is an agreement between a defendant and prosecutor where the defendant agrees to plea guilty or no consent. the charges then get dropped or the sentencing gets reduced. people normally do not want to plea guilty that is why they oppose them. brainliest?

Most criminal convictions are the result of plea bargaining, a process of negotiations between prosecutors and defense attorneys ... Some victims and their families argue that criminal defendants can get off too lightly, while some defendants say they only plead guilty because of pressure and fear.