Liquidation preference defines how exit proceeds are distributed. The standard structure is '1× non-participating', meaning preferred holders get back their original investment first and then convert to common to share the remainder pro rata. Multiple preferences (2×, 3×) and participating preferred amplify the investor's exit share at the expense of common.
In a $50M exit on a company with $30M in 1× non-participating preferences, preferred holders take $30M first, and the remaining $20M is shared with common per ownership. With 2× participating preferred, preferred holders take $60M first, wiping out common entirely if the exit is below that.