Why is Google still serving dodgy ads?

Google is still serving dodgy ads, despite taking steps to improve ad quality. The issue persists due to the complexity of the ad auction process and the difficulty in detecting and filtering out malicious ads. Google's ad auction system prioritizes bids from high-paying advertisers, which can lead to ads that are not relevant or even malicious. The company has implemented various measures to combat the issue, including the use of machine learning algorithms to detect and filter out suspicious ads. However, the effectiveness of these measures is uncertain, and the issue remains a concern for users.