The blog post by Roi Katz explores the basics of using Couchbase Lite indexing, specifically through the creation and utilization of views, to enhance data retrieval in applications. It highlights the transition from accessing data solely by primary key to employing views for more versatile querying options. The post provides a step-by-step guide on setting up a Windows Presentation Foundation (WPF) project, using the NuGet Couchbase.Lite package, and defining views, such as "docs_by_city", to map and filter data by specific properties like "City". It emphasizes the importance of keeping indexes small for performance efficiency and explains how to run queries on these views, retrieve results, and format them as JSON. The tutorial concludes with a demonstration of inserting sample data into the database and encourages readers to explore further development using Couchbase Lite views, with additional resources available on the author's GitHub page.