You would have seen vloggers carry a camera with microphones on the camera’s shoe. On-camera mics are designed to work with cameras. They are lightweight and let you record crisp audio along with a high-quality video for your vlog.  Most of the time, in-camera mics do not give the best performance. You will often find that your voice is muffled in the audio, or it is inaudible among the background noise. In this scenario, an external mic comes in handy.