The lesson is about the Ichimoku cloud crash course on Ichimoku trading. The instructor provides an overview of the course and advises viewers to follow at their own pace using the slides provided. He emphasizes that the lesson is not financial advice, and warns that traders can lose all their money. The instructor then demonstrates how to set up the Ichimoku key and shows how it can be used to find areas of support and resistance. He also covers the TK cross, Coomer breakouts, and other trading strategies using examples from Bitcoin and Ethereum. The lesson concludes with a reminder that signals vary in strength and that time frames should be considered when using the Ichimoku system.