Separating binaries from sources is a Debian convention. If you're just using a library, non-dev is sufficient. If you're developing with that library, you'll a

Separating binaries from sources is a Debian convention. If you're just using a library, non-dev is sufficient. If you're developing with that library, you'll also want -dev, which will install the headers. Nothing special about the trailing 1 or 0; that's just part of the package name/version.