A more thorough explanation:

Definition: A walkout is an act of leaving a work assignment, meeting, or other event as a show of protest. It is a form of strike.

• Employees at the factory staged a walkout to demand better working conditions.
• Students organized a walkout to protest against gun violence.

In the first example, the workers left their work as a form of protest to demand better working conditions. In the second example, the students left their classes to protest against gun violence.