An action hero is a term used to describe a character in a movie, television show or book who is known for their bravery and ability to take bold actions. These characters are often portrayed as fearless individuals who will stop at nothing to protect others or complete a mission. They are typically skilled fighters and have exceptional physical abilities that allow them to overcome obstacles and defeat enemies. Action heroes are often the main protagonists in their respective stories, driving the plot forward with their courageous deeds and inspiring others through their actions.