It is thinked to be a virtual market, between companies from construction, interior design, architects etc AND general clients.
The idea is this: you, as client willing to build a house, to renovate, to design the interior or the landscape around your house etc etc etc, you post your request on a website. On the same website,companies from construction, interior design, architects etc are registred (and some of them pay to be in front). For example: you as a company register yourself providing services A, B, C and D. The client posts a request mentioning that he needs services C and D. In that moment, his request is forwared to the companies in the data base that offer the services C and D requested by the client. Everything directly and they make him an offer (they = all the companies interested in that deal). It's kind of a bid. And than the client chooses the best offer suitable for him.