# Category: System Design

- [What Is Elasticsearch? 10 Simple Things Beginners Must Know](https://whattheweb.co.in/what-is-elasticsearch-10-simple-things-beginners-must-know/): Elasticsearch is an open source search and analytics engine, built on a library called Apache Lucene, that stores your data as JSON documents and finds matches in near real time,…
- [OAuth Explained: A Simple, Secure Guide to Google Sign-In](https://whattheweb.co.in/oauth-explained-a-simple-secure-guide-to-google-sign-in/): What is OAuth? OAuth is a standard way to let one app access your stuff on another service without ever giving it your password. For example, the “Sign in with…
- [Caching Strategy: What It Is and How to Set It Up (A Vibe Coder’s Guide)](https://whattheweb.co.in/caching-strategy/): A caching strategy is your plan for what data to store in a fast place, how long to keep it there, and when to refresh it. Done right, your app…