Money collect is a mechanic in which cash-value symbols land on the reels showing amounts, and a separate collector symbol, when it lands at the same time, gathers all of them and pays the total.
Without a collector, cash symbols usually pay nothing, so most of the value comes from the two landing together. In free spins, collectors often stay or accumulate, and collecting a certain number can upgrade the round with more spins, higher cash values or a multiplier.
The idea is widely used across studios and themes, including fishing games where the collector is a fisherman wild. It overlaps with cash on reels and hold and win. See our money collect feature page.