What is Digital Photography

The type of photography where cameras containing photo detectors using lenses are used to take image rather than the films, is termed as Digital Photography.

Digital Photography is one of the form of Digital imaging. With Digital Photography the film is replaced with light sensitive image sensors, made of millions of Photo Electric devices which convert light to electrical signal. The strength of this signal depends upon the intensity of light to which image sensor is exposed.

DIGITAL PHOTOGRAPHY ADVANTAGES

You can instantly review the image and provide instant feedback, which results in further adjustment and improvement to the photograph.

Storage cost is less, since you will not have to buy the film every time.

You can store information related to image like, Date,location on the same file.

References:
Wikipedia,  Practical Photography tips