You can enter or edit your cargo details. Since your full details are clearly seen by registered shipbrokers and ship owners, they can directly reach you to supply feasible ships. Cargo-Search can easily search cargoes by "Loading Region & Lay Can" criterions.
Consolidator is a place where group of people gathers to use container in common. Anybody can arrange pre-carriage, but the main idea is to find conducted parties to whittle down transport expenses.