There are too many technical terms to digest in these documents. So we have provided a reference for you to learn more if you like to.

Terms Definition
Blockchain Blockchains bring immutability, transparency, efficiency, auditability, and security, resulting in lower costs across various industries, companies and applications. Recently, academics have identified six blockchain layers, including data transfer, network, consensus, incentive, contract and application. Don’t panic! We have simplified all of them in the following sections.
Polygon Polygon is a decentralised Ethereum scaling platform that enables developers to build scalable user-friendly dApps with low transaction fees without ever sacrificing on security.
Smart Contracts A smart contract gets triggered when certain conditions are met. The most common smart contracts are written on Ethereum networks using solidity, and they're designed to remove human error from systems.
Non-Fungible Token (NFT) NFT which stands for "Non-Fungible Token,” is a digital asset at a basic level. It is proof of ownership of unique physical or digital items, like real estate, works of art, videos, or music sold online.
Soulbound Token Soulbound Token is an NFT attached to you for the rest of your life.
Digital Key This is a mobile or PIN access to a SmartLock.