The video tutorial covers the design and implementation of event-driven microservices using AWS Lambda. It explains the benefits of event-driven architecture, such as agility and scalability, and how AWS Lambda fits into this model by handling events from various sources. The tutorial discusses different invocation types, including synchronous, asynchronous, and event source mapping, and how they apply to microservices communication. It also highlights design patterns and best practices for building serverless applications, particularly in the context of an e-commerce application.

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