In the Web2 era, to "reserve" meant to ask a centralized authority to hold a specific item or a place in a queue for you. Whether reserving a pre-order for a new gadget, a username on a social media platform, or a ticket for an event, the reservation was a non-transferable promise stored in a company's private database. This claim had no value outside the specific platform's ecosystem and was entirely dependent on the trust that the user placed in the company to honor their spot. In the Web3 and Fourth Industrial Revolution (4IR) paradigm, to "reserve" is to create a verifiable and often transferable on-chain claim to a future right or asset. Reserving a spot for an NFT mint, for example, means your wallet address is cryptographically added to a smart contract's presale list. This reservation can be represented by a token, making the claim itself a liquid asset that can be traded on a secondary market. The act of reserving transforms from a static, trust-based promise into a dynamic, user-owned, and transparently-enforced right on a blockchain.