# Caching Headers

Headers that say how long a response may be reused.

## What is **Caching Headers**?

**Caching headers** such as `Cache-Control: max-age=300` tell browsers and CDNs how long they may reuse a response without asking again.

```text
Cache-Control: public, max-age=300
```

Level: Freelancer · [More Web Development terms at this level](https://www.ask-codey.com/glossary/subjects/web-development/freelancer)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/caching-headers