There are two main types of reverb: algorithmic and convolution. Algorithmic reverb generates reverb sound based on user-defined parameters, aiming to emulate real spaces but sounding less natural. Convolution reverb uses actual recordings of real room acoustics, sounding more realistic but being more computationally expensive. The document compares the key aspects of each like parameter control versus natural sound for algorithmic and convolution respectively, and ease of use versus sound quality and CPU load.