Is it automatic mode or M mode to shoot the wedding scene with digital camera?

Automatic file allows you to take photos with appropriate exposure quickly, without overexposure or underexposure because it is too late to adjust the shutter and aperture.

M files allow you to take more creative photos.

The automatic file is used at the beginning of the wedding, but the M file is used when exchanging rings and interacting with both parties, which can not only capture the picture, but also show the details.