Website DDoS Attack System architecture for dummies

The architecture for DDoS Distributed Denial of Service attacks jam internet communications by making the server think that traffic is through the roof and results in an internet traffic jam. Like protestors walking on the highway. Well, maybe that's a bad example. Anyways, ddos attacks on elon musks' website X.com today, resulted in a denial of service for the end user. Ultimately, the people suffer most.