Client and server
The client is the app a person uses, usually a browser.
Definition
The client is the app a person uses, usually a browser. The server is the computer that stores data and answers the client's requests.
Use case
When you open a page, your browser asks a server for the page's files. Knowing which side does what tells you where a bug or a slow load comes from.
Related terms
Documentation
HTTP
The reference for how clients and servers talk, with a guide for each part of the conversation.