"Patrol" means to be careful and keep a watch over an area or over something with proper attention and care.
Explanation:
Patrol is an expedition to keep watch over an area, especially by guards or police walking or driving around at regular intervals. It is to keep watch over (an area) by regularly walking or traveling around or through it.
A patrol is commonly a group of personnel, such as law enforcement officers, military personnel, or private security contractors that are assigned to monitor a specific geographic area for the security of the people of that area. This is also often referred to as a beat.
