About the soumith of conda

When I install pytorch in my ubuntu, I found that this command
conda install pytorch=0.3.1 -c soumith
I don’t know what is the meaning of “-c soumith”, so could anyone help me to explain what does this mean, or give some direction to know about it?

It was the conda channel created by Soumith.
The current PyTorch release is hosted on the pytorch channel (conda install pytorch -c pytorch).

Thank you very much!