I appreciate your help validating my understanding of the Pipeline concepts. I understand that:
A pipeline is a set of stages that could be $match, $project, etc. and the stages process the documents based on aggregation operators (also called expressions) like $gte, $lte, and other that we studied in M001-Basics. But this expressions or aggregation operators could have an argument or a set of arguments like ["$numberOfMoons", 0]. I cannot understand well how the argument works in this pipeline context. I appreciate if you can explain me with some examples of every case.
Thanks for all.