This document discusses polyglot persistence in Azure, which refers to using multiple data storage technologies in the same application. It notes that Azure provides many persistence services like document, caching, search, and queue storage. The document recommends rethinking traditional applications to leverage these services, for example by exporting documents and images to document storage from a relational database in an e-commerce system. Using polyglot persistence allows applications to scale by utilizing the most appropriate storage for each use case.