It seems that many packages published could be installed using PacletInstall . For example, from this Rubi install instruction webpage, we could see the comman:
and the package then would be downloaded and installed automatically.
How does this function works? And it seems there is not documentation that describe this function in documentation center. And is it possible to find a third party package(for example, I'd like to find a package that relevant to formula-manipulation) that I need to use PacletInstall or relative function like that?