What is the primary purpose of signage that indicates "Wet Floor"?

The primary purpose of signage that indicates "Wet Floor" is to warn workers and anyone present in the area about slippery conditions. These signs are crucial for injury prevention, as wet floors are a significant hazard that can lead to slips and falls. By clearly displaying a warning, the signage helps to alert individuals to exercise caution while navigating the area, ultimately aiming to enhance safety in the workplace.

The other options, while related to workplace conditions, do not specifically address the immediate concern of safety regarding wet surfaces. Signage about cleaning schedules or maintenance staff presence might inform about activities occurring in the area but does not directly communicate the risk posed by a wet floor. Similarly, indicating that floors are being replaced does not convey the same urgent need for caution that is associated with a wet floor situation.