Prohibition signs are visual indicators used to communicate restrictions or rules in a specific area. They typically feature a red circle with a diagonal line crossing through a symbol or text, signaling that certain actions are not allowed. Common examples include signs for no smoking, no entry, and no parking. These signs are essential for maintaining safety and order in public spaces, workplaces, and private properties. By clearly conveying prohibited actions, they help prevent accidents and ensure compliance with regulations. Understanding and respecting prohibition signs is important for everyone to promote a safe environment.