The built-in mic is better than many webcam or laptop microphones and often perfectly adequate for calls, but dedicated microphones still sound fuller and more professional.
Pros: motion blur, autofocus accuracy
Cons: lip-sync accuracy, security features
The built-in microphone is divisive. Many users find it surprisingly clear and convenient for calls, while others report thin sound, echo, clipping, or quality well below a dedicated mic.
Pros: adjustable field of view, rotation flexibility
Cons: echo reduction, security features