Food was not kept cold enough, hot enough, cooled fast enough, or cooked or reheated to the right temperature. Bacteria grow quickly in the "danger zone" between 41°F and 135°F, which makes this one of the most important food-safety checks.
Adequate ventilation/ Lighting - designated areas, use
In plain English
Floors, walls, ceilings, lighting, ventilation, or garbage areas needed repair or cleaning. These are usually less urgent than food-handling problems but still need to be fixed.