An extension of the question Should conda, or conda-forge be used for Python environments? , is there an online explanation of conda packages, or a way for the layman to know what package is the right one to install?
For example, searching for conda install opencv, there is the conda-forge link that has 480k downloads and anaconda link that has 42k downloads. Then other stackoverflow questions How do I install Python OpenCV through Conda? get answers for menpo link with 150k downloads.
Are all the channels 'safe' in that they are vetted and not random people? Is there a comparison site showing the differences between the options?