IDX search users are home buyers or sellers in the market to buy or sell real estate.
Real estate agents use IDX to market homes, attract leads, and close more sales.
[2] By displaying listings online, agents can reach a larger audience and better match available homes to prospective buyers.
These "display rules" are set by the Multiple Listing Service organization, which generally forms its policy around the recommendations of the National Association of Realtors.
An alternative policy called the Internet Listing Display was considered in 2005 but later abandoned in the same year as a result of an investigation from the U.S. Department of Justice into anti-competitive practices by traditional real estate brokers.