This summary provides an overview of how to build resilient service-to-service communications in ASP.NET Core using Polly, a .NET resilience framework. The author creates two web services: an unreliable "temperature" service and a dependent "weather" service that calls the temperature service. The weather service uses a simple retry mechanism with Polly to make reliable requests to the temperature service. With just a few lines of code, the application becomes more fault-tolerant and can withstand failures in the network or other external factors. The author emphasizes that this is not the only type of retry used by Polly, but rather a basic example of how to get started with the framework.