Companies are losing millions of dollars to advertising fraud, where bots are used to simulate human interactions with online ads. A recent court case highlighted the issue, with a man sentenced to 10 years in prison for defrauding US companies through fake online advertising. The problem is widespread, with estimates suggesting that up to 40% of web traffic is generated by bots. The digital advertising industry has been criticized for its lack of transparency and accountability, allowing fraudulent activities to thrive.