“What happened?” means “Tell me what occurred” or “Give me a straightforward account of the event.” It asks for the event itself, not the cause or process behind it.

Usage

You’d use it when you want someone to explain a situation clearly:

  • “What happened at the meeting?”
  • “What happened after you left?”
  • “What happened to your phone?”

In those cases, the speaker wants the basic story or sequence of events.

Difference in meaning

“What happened?” is different from “How did it happen?”

  • “What happened?” = What occurred?
  • “How did it happen?” = What caused it, or what was the process?

In conversation

The phrase can sound neutral, caring, surprised, or serious depending on tone and context. In casual or forum-style discussion, it often just means someone is asking for the latest details about an event or situation.

Example

A simple reply might be: “There was a delay, and the meeting started late.” That answers what happened without going into every cause.

TL;DR: “What happened?” = “What occurred?” ; “How did it happen?” = “What caused it?”