Amazon EC2 (Elastic Compute Cloud) is a web service provided by Amazon Web Services (AWS) that allows you to provision and manage virtual servers in the cloud. EC2 provides scalable computing capacity and allows you to quickly launch instances of virtual servers, configure them based on your requirements, and manage them as per your needs.

Here are some key features and concepts related to Amazon EC2:

1. Instances: An EC2 instance is a virtual server that you can launch in the cloud. Instances can be configured with various operating systems (such as Amazon Linux, Windows Server, Ubuntu, etc.) and come in different instance types, which determine the available compute, memory, storage, and networking capacity.

2. Scalability: EC2 enables you to scale your computing capacity based on demand. You can easily increase or decrease the number of instances to match your workload requirements, either manually or automatically using Auto Scaling.

3. Elastic IP Addresses: EC2 provides Elastic IP addresses, which are static, public IPv4 addresses that you can assign to your instances. Elastic IPs allow you to maintain a consistent IP address for your instance even if you stop or start it, making it easier to route traffic or handle DNS configurations.

4. Storage: EC2 offers various storage options. Amazon Elastic Block Store (EBS) provides block-level storage volumes that can be attached to EC2 instances as persistent storage. Amazon S3 can be used for object storage, and there are also instance store volumes that provide temporary block-level storage directly on the host machine.

5. Security: EC2 instances can be secured using AWS Identity and Access Management (IAM) to control access to resources. You can configure security groups, which act as virtual firewalls, to control inbound and outbound traffic to your instances. Additionally, you can encrypt EBS volumes and use other security features provided by AWS.

6. Networking: EC2 instances can be launched in Amazon Virtual Private Cloud (VPC), which provides isolated networks within AWS. You have control over IP addressing, subnets, routing, and security settings within your VPC. You can also configure Elastic Load Balancers and Route 53 to distribute traffic across multiple instances.

7. Monitoring and Management: Amazon EC2 integrates with Amazon CloudWatch, allowing you to monitor your instances and collect metrics on CPU usage, network performance, disk utilization, and more. You can also manage your instances using the AWS Management Console, Command Line Interface (CLI), or APIs.

8. Integration with Other AWS Services: EC2 seamlessly integrates with other AWS services. You can easily integrate EC2 instances with Amazon RDS for managed relational databases, Amazon S3 for object storage, Amazon DynamoDB for NoSQL databases, and other services to build scalable and robust applications.

Amazon EC2 provides a flexible and scalable infrastructure for running a wide range of applications. It is widely used for hosting websites, running web and mobile applications, performing batch processing, running big data workloads, and much more. With EC2, you have full control over your virtual servers and can tailor them to meet your specific requirements.