Package params provides a globally available parameter store.
There are two main types, Keeper and Subspace. Subspace is an isolated namespace for a paramstore, where keys are prefixed by preconfigured spacename. Keeper has a permission to access all existing spaces.
Subspace can be used by the individual keepers, who needs a private parameter store that the other keeper cannot modify. Keeper can be used by the Governance keeper, who need to modify any parameter in case of the proposal passes.
The following contents explains how to use params module for master and user modules.