The process of automatically deploying changes to a staging environment for testing is known as Continuous Deployment. It ensures that the changes are thoroughly tested in a controlled environment before being released to production.

In ACID (Atomicity, Consistency, Isolation, Durability), the "P" stands for Persistence. It ensures that once a transaction is committed, its effects are permanent and survive subsequent system failures.

For a social media platform with high availability and scalability needs, NoSQL databases are often preferred. They offer horizontal scalability and flexibility in handling diverse data types commonly found in social media applications.

Containerization helps in the deployment process by ensuring consistency across different environments, providing isolation for applications, and offering portability, allowing containers to run consistently across various systems.

Docker plays the role of containerization in CI/CD pipelines. It allows packaging applications and their dependencies into containers, ensuring consistency across different environments. This simplifies deployment, improves scalability, and enhances the reproducibility of the entire process.

Caching is a technique that involves storing copies of frequently accessed data in a faster storage location, such as memory or a dedicated cache. This helps improve access times and overall system performance.

In JavaScript, the this keyword refers to the current instance or object. Its value depends on how a function is called and is often used in object-oriented programming.

Memoization is a technique in JavaScript used to cache and reuse the results of expensive function calls. By storing the results of expensive function calls and returning the cached result when the same inputs occur again, it helps optimize overall function performance.

The CSS margin property controls the spacing of an element. It defines the space outside the element's border, providing separation from other elements.

The Builder design pattern separates the construction of a complex object from its representation. It allows the same construction process to create different representations, promoting flexibility and reusability.