Amazon Web Services (AWS)

1. Scalability: Easily scale resources up or down to meet demand without upfront investments.

2. Flexibility: Choose from a wide range of services for computing, storage, databases, analytics, and more.

3. Reliability: Highly available and durable infrastructure with multiple data centers and regions.

4. Security: Robust security measures, including encryption, identity and access management, and compliance certifications.

Before learning Amazon Web Services (AWS), it's beneficial to have proficiency in:

1. Basic Cloud Concepts: Understanding of cloud computing fundamentals such as Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

2. Networking: Knowledge of networking concepts including IP addressing, subnetting, routing, and DNS.

3. Security: Familiarity with security principles such as encryption, access control, and network security.

4. Linux/Unix: Basic understanding of Linux/Unix operating systems and command-line interface.

By learning Amazon Web Services (AWS), you gain skills in:

1. Cloud Computing: Understanding of cloud computing concepts, including Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

2. AWS Services: Proficiency in using various AWS services such as EC2, S3, RDS, Lambda, and more for building and deploying applications in the cloud.

3. Scalability and Elasticity: Ability to design and implement scalable and elastic architectures that can automatically adjust to changing demand.

4. Security: Knowledge of AWS security features and best practices for securing cloud environments, including identity and access management, encryption, and compliance.