The document discusses two types of reverb - algorithmic and convoluted. Algorithmic reverb is created from a mathematical formula to simulate a space, while convoluted reverb uses actual recordings of real spaces. It provides examples of the interfaces for algorithmic and convoluted reverb plugins, explaining how their various parameters control aspects like early reflections, reverberation time, and impulse responses from exotic spaces. The author hopes sharing these reverb basics helps readers get more out of their mixes.