In this lecture, the speaker discussed the basics of business, such as profits, revenues, expenses, balance sheets, and income statements. He also covered the differences between good and bad businesses, debt and equity investing, and how to select investments. The speaker emphasized the importance of investing in creating wealth and achieving financial goals, and the impact of returns over a long period of time. While the lecture is just an introduction to finance and investing, the speaker recommends learning more, as it is a constantly changing and challenging field. Additionally, the concepts discussed are useful not only in investing but also in making life decisions.