Josh Miller dives into the practical use of AI in Excel and Google Sheets, focusing on how these tools can revolutionize data analysis in real estate. He begins with the installation of the GPT add-on for Excel and Google Sheets, demonstrating their identical functionalities. Josh highlights various use cases, including analyzing large data sets, automating data retrieval from the web, and creating custom prompts for efficient data processing. He also introduces HotAsZip.com, a free resource for real estate data, and explains how to use AI to extract and analyze this information. The video concludes with tips for creating effective AI prompts and enhancing data-driven decision-making in real estate.