Cockroaches are considered a common household pest and can pose health risks. They enter homes or buildings by coming in through cracks or crevices in walls, floors, or foundations. They can also be brought in through infested items such as cardboard boxes, grocery bags, or secondhand furniture. It’s important to keep your living space clean and clutter-free, seal up any entry points, and address any infestations promptly to prevent them from multiplying.