Like in ancient times digital photos require proper developing process. Cameras do it on-the-fly but if it is essential to get the best from captured photo it is better to do it manually to maintain full control of the process.
Samples of digital development process
Below you can see the difference between unprocessed capture and developed one. We can control and correct many parameters of photo i.e. exposure, shadows and highlights, saturation, white balance and many more.
Use arrow or dots under picture to see difference