Reputation-wise: In restaurants, bars, grocery stores, markets, and other spaces where food is a constant, it is extremely important to keep the space free of rodents, cockroaches, flies, and other animal crawlers. Otherwise, you could lose customers and clients, but worse, create a negative stigma if they take to social media about their negative experience!
Security-wise: Rodents can cause serious damage to the premises, compromising its security and putting both employees and customers at risk.