Once securely fastened, the bracket loops over the top of your camcorder, providing a home for your lights and mikes. If your camcorder doesn't include an accessory shoe, or you want to use more than one accessory at a time, a bracket is an inexpensive and vital add-on you gotta have. In the last five years, camcorder technology has made incredible strides in light sensitivity and now you can get good-looking shots where previously all you would have seen would have been mush. However, sometimes it just gets too dark and you've got to add some light, especially if you want crispy-looking images. There are some choices.
Many camcorders come with built-in lights.
These are not very effective, only lighting up a few feet in front of the lens and usually not very evenly. You end up with an image that looks like you were lighting it with a flashlight. Even worse, lights suck up power. Most on-camera lights are powered by the camcorder batteries. And as you know, camcorder batteries don't last long enough anyway.