The document discusses Amazon EFS (Elastic File System) and how it can be used with serverless and containerized applications. Some key points discussed include:
- Stateful applications benefit from durable shared storage provided by Amazon EFS for storing state. 
- Distributed applications like web serving and machine learning inference benefit from a shared storage layer. 
- Modern data-intensive applications require fast access to large volumes of data stored in Amazon EFS.
- Amazon EFS can be used to migrate existing applications to the cloud or modernize applications into containerized/serverless architectures for increased scalability and efficiency. 
- Amazon EFS provides a shared file system that can be mounted by containers,