The blog post series provides a detailed guide on transitioning a monolithic application into microservices, focusing on the extraction and data management of a specific microservice called OrdersService, responsible for booking tickets. The process involves utilizing Dynatrace for monitoring and identifying traffic flow, thereby helping to decouple the service from the monolith. It emphasizes the importance of understanding both data and domain models, using Teiid to virtualize these models and manage legacy and new data sources. The guide also covers the technical steps necessary for setting up and configuring the microservice, including creating a separate database and using annotations like @InsertQuery and @SelectQuery to manage data operations. The ultimate goal is to ensure the new microservice is fully functional and integrated with both its own and the monolith's database, setting the stage for its deployment in subsequent posts.