The tag-excerpt and tag-info for (configuration-spaces) has been created.

"Configuration spaces refer to topological spaces that consist of ordered or unordered subsets of a topological space, of a given (finite) cardinality."

In Wikipedia article I also see another meaning: "In classical mechanics, the parameters that define the configuration of a system are called generalized coordinates, and the vector space defined by these coordinates is called the configuration space of the physical system"

I'd guess that the two are related. (And I would not have problem with tag being used for either of them.)

The reason why I think it is good to have some usage guidance in the tag-info is that configuration is very common words, so users might start putting configuration-space tag to questions which are about any kind of configurations, totally unrelated to the common meanings of the phrase configuration space.