This document discusses different types of minimum viable products (MVPs) that can be used to validate solutions, including fake door MVPs, landing page MVPs, email campaign MVPs, marketing campaign MVPs, pre-order MVPs, and single-feature app MVPs. It also discusses prioritizing MVP features based on their importance and impact, including must-have, basic, neutral, performance, and delighter features. Additionally, it outlines different strategies for prioritizing features, such as quick wins, maybes, big bets, and time sinks.