Taking photos of snow is usually a challenge. This is because the camera is often fooled by the bright white surroundings. Because it thinks the world is gray it may automatically make snow look gray.
One also cannot trust the preview of photos on the small LCD screen on the back of the camera. There – very often – bright white snow looks washed out. This makes it difficult to judge whether one has already lost important details. When this has happened, it is often irretrievable.
When everything in your surroundings is white, the camera may also have difficulties autofocusing. This is because autofocus works by contrast. Another problem may be caused by the automatic white balance: Snow in bright sunlight often looks bluish in photos.
On the Internet you will find tips on how to circumvent these problems (and a few more) when photographing snow. I usually shoot in RAW mode which later gives me more options to troubleshoot the camera‘s (and my) mistakes. I also usually shoot a small series of photos of each theme with varied camera settings and, later, select the best.