What does a groover do in concrete finishing?

A groover is an essential tool in concrete finishing used specifically to control the formation of cracks that can occur due to drying shrinkage or temperature changes. When concrete sets, it undergoes shrinkage as it cures, which can lead to cracking if not properly managed. The groover creates intentional grooves in the surface of the concrete, which act as control joints. These joints are strategically placed to guide the cracking in predetermined lines, thereby minimizing the risk of uncontrolled, random cracks that could affect the integrity and appearance of the slab.

This proactive approach to crack management not only enhances the longevity of the concrete but also helps in maintaining a uniform aesthetic. The other options focus on different aspects of concrete finishing. While leveling the surface, applying textures, or adding decorative finishes are important tasks in the finishing process, the specific role of the groover is primarily aligned with controlling crack locations, making the correct answer clear in this context.