please explain the different camera scenes.

[Sony-xperia-m-1]

What is soft snap? What does it do?

[Uliwooly]

I would use landscape 

[Sony-xperia-m-1]

Even for medium range shots, such as photographing something 2- 5 meters away? Or what would you use?

[Sony-xperia-m-1]

Or rather what scene would you choose for taking a photo :

0.5 meters away, good light.

5-20 meters away, good light.

5-20 meters away, bad light.