It was open to interpretation and presented many different ideas. It also had many metaphorical and deeper messages - the path, the crows etc. It was also one of his last paintings so is very important and a famous art piece that has many hidden meanings. It creates a great sense of emotion and feelings and allows viewers to perceive certain ideas - is very famous in the history of art. Very simplistic painting with many levels. Created a redeemed sense of depth to painting.
The techniques and paints used also hint at a specific time period so enable people to determine a rough time it was made and represents other paintings from that time that can be compared to his painting, to determine time and resources occurring in that time period.