Key features and concepts of Amazon Elastic Beanstalk include:

Application Deployment: Elastic Beanstalk supports a variety of programming languages and web application frameworks. You can deploy applications developed in languages like Java, Python, Ruby, Node.js, PHP, .NET, and more.

Managed Infrastructure: With Elastic Beanstalk, AWS manages the underlying infrastructure, including provisioning of servers, load balancing, auto-scaling, monitoring, and more. This allows developers to focus on writing code and building features.

Application Versions: You can deploy different versions of your application, allowing for easy rollback to previous versions if needed. This promotes a controlled and staged release process.

Environment: An environment in Elastic Beanstalk is a container for deploying applications. You can create multiple environments for different stages (development, testing, production) and easily switch between them.

Auto-Scaling: Elastic Beanstalk can automatically scale the number of instances based on traffic and workload. This helps maintain application performance during spikes in traffic and reduces costs during low-demand periods.

Load Balancing: Elastic Beanstalk automatically sets up load balancing to distribute incoming traffic across instances, ensuring high availability and improved fault tolerance.

Database Integration: Elastic Beanstalk can integrate with AWS database services like Amazon RDS (Relational Database Service) for managing databases used by your application.

Monitoring and Logging: Elastic Beanstalk integrates with Amazon CloudWatch to provide metrics, logs, and performance monitoring of your application. You can set up alarms and notifications based on metrics.

Customization: While Elastic Beanstalk handles many aspects of infrastructure, you can also customize the environment by specifying configuration settings, custom server scripts, and more.

Integration with Other AWS Services: Elastic Beanstalk can be integrated with other AWS services, such as Amazon S3 for storing application files, AWS Identity and Access Management (IAM) for access control, and more.

Continuous Integration/Continuous Deployment (CI/CD): Elastic Beanstalk can be used with CI/CD tools to automate the process of deploying new versions of your application.

Supported Platforms: Elastic Beanstalk supports web applications built using a variety of technologies, frameworks, and stacks. This includes single-container and multi-container Docker environments.