IDX, or Internet Data Exchange, allows real estate agents to display MLS listing data from their brokerage website. It is a technology tool that sources MLS property information to power online property searches. The document discusses how IDX benefits agents by making their website more engaging for buyers who start their home search online and are likely to sign with the first agent they contact. It also provides analytics and a way to capture leads from visitors to the agent's site. Finally, it explains different methods agents can use to implement IDX technology.