An "effective watchdog" refers to a person, organization, or group that closely monitors and keeps a careful eye on something, like government activities or corporate behavior, to ensure it is working correctly, ethically, and accountable.
Sentences with «effective watchdog»
He's friendly with strangers so not the most effective watchdog and doesn't do well when left alone for long periods. (petguide.com)
Terripoos are easy to train, and they make effective watchdogs. (petpremium.com)
She is a quiet but extremely effective watchdog. (soonervet.net)