Advertising watchdog is an entity who monitors and audits advertising claims for truthfulness, accuracy, and fairness.
They provide protection against false advertizements. They make sure that the content in the advertizement is true to what the company says they are selling.
They monitor all channels of advertising like print ads, TV commercials, Internet banners etc. they also conduct research on advertisements to find out if their claims are accurate or not
Lastly, they provide advice to companies on how to avoid false advertizements