Welcome to this section in the course, which is all about helping you to understand the theoretical side of blockchain technology before diving into the practical elements. Before diving into all, I want to give you an introduction in this lecture. So, let's take it from the top, ensuring you understand what we're going to be covering clearly. One, what is the blockchain? In this lecture, I want to give you a general idea of what blockchain technology is before discussing the deeper variations of blockchain technology with you. Two, private and public blockchains. We will then swiftly move on to discussing the various types of blockchain, simply because it cannot be described solely as one term. Highlighting the differences between them, so the differences between private, public, and consortium blockchains. Three, example use cases of blockchains. Now you'll have an understanding of blockchain technology in this lecture. We'll be showcasing how all of this comes together to create real-life use cases. Four, what are smart contracts? In this lecture, we'll be going over smart contracts, which is a large proportion of the use cases upon the blockchain, developing smart contracts. They power a whole range of use cases, so that is something we'll be discussing in this lecture. Five, how widely used dapps are. As we move onto this lecture, it's important for a test to hone in on the fact just how widely used these decentralized applications are, otherwise known as dapps. You may be surprised at the findings, all of this will highlight, once again, just how infant this technology is. Six, introducing Web 3.0. So, blockchain technology is often referred to as being a part of the Web 3.0 era, hence in this lecture, we'll be diving into just what being a part of the Web 3.0 era entails. Seven, the blockchain we'll be working with. In this lecture, I want to highlight the blockchain we'll be working with. Hence, as we move forward in the course to the practical elements, it is clear. So, that's how this whole section is structured. I look forward to seeing you in the next lecture, where we will start by discussing what blockchain technology is as a whole.