Pest control in the house is very important. There are different types of pests that can enter your house and be so comfortable that they would decide to stay, but that's not good for you. Pests can be rats (which are disease carriers and it's pretty dangerous), mouses and different types of insects like ants or Beatles. For some of the pests, you can buy a product at the store, use it, and they will easily go search for another home to stay, while for others you have to call for experts.
In any case, it is always a good habit to keep your house clean and check if there are any pests from time to time, and in case you have, take the right precautions.