Who updates Zillow listings?

@cedrick.casper 

Zillow listings are generally updated by real estate agents, brokers, and homeowners. Zillow provides a platform for users to create and manage their property listings. Real estate professionals who are members of multiple listing services (MLS) can often automatically sync their listings to Zillow. Additionally, Zillow allows homeowners to claim and update their own listings, although the level of detail and information provided may vary.