It "sloganizes" the phrase before it to prop it up as somehow official/authoritative (as though it were trademarked), often with ironic intent. In this case, "P

It "sloganizes" the phrase before it to prop it up as somehow official/authoritative (as though it were trademarked), often with ironic intent. In this case, "People who make decisions know that Linux is Good™" indicates an idea with mindshare and hints at an underlying dogma or cliché.