Pests would take over the Earth if we let them & if no one used pesticide you couldn't afford groceries or eat out in restaurants since the food would not be safe. Rodents are considerred pests as well as insects.
"Pest offense controls lots of different little bugs and small rodents that invade your home. Some insects may include ants,crickets or spiders. It can also work for things like mice and rats."
That all depends on what type of pest you have, where you are located (as some methods are governed by law) and what is the company's common practice. Some jump straight to pesticides while others...
You can reduce pest pressure and reduce the likelihood of an infestation with simple good sanitation practices. For example, no food debris and you are less likely to get roaches, keeping dumpsters...