Link is an online real estate platform and marketplace that allows property owners to sell their homes without paying real estate commissions. It aims to create an alternative to traditional real estate models by offering a no-commission, for-sale-by-owner listing platform. Key features include allowing public bidding on properties, a spending calculator for estimating sale costs, and optional concierge packages. The platform plans to generate revenue through advertising, flat listing fees, service provider subscriptions, and over time, selling market data.