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What are browser cookies?

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Quick answer

Browser cookies are small text files that websites store on your device to remember information about you — like your login, settings, or items in a cart. They make browsing smoother, but some also track your activity across sites. They're small files websites save on your device.

Key things to understand

  1. They're small files websites save on your device.
  2. They remember logins, preferences, and cart contents.
  3. Session cookies vanish when you close the browser; others persist.
  4. Third-party cookies can track you across websites.

People also ask

What are browser cookies?
Small files websites store on your device to remember information like logins, settings, and activity.
Are cookies bad for privacy?
Some are harmless and helpful, but third-party tracking cookies can follow you across sites, raising privacy concerns.
Should I accept or reject cookies?
Essential cookies are usually fine; you can often reject non-essential tracking cookies for more privacy.

Part of the guide: How the Internet Works →