The integration of MongoDB Charts with Atlas Data Federation allows users to visualize data from blended application and cloud object data without writing any code. This is achieved by adding the Atlas Data Lake as a data source within Charts, which provides the ability to visualize data from multiple sources such as Atlas databases, AWS S3 buckets, and blended data. The integration simplifies analysis while eliminating the need for creating an Extract-Transform-Load (ETL) process across different data sources. With this new functionality, users can easily create visualizations of their data, including charts and graphs, to gain insights from aggregated customer profile and contract data, without having to write any code or perform complex data transformations.