• Lifetime of a cookie
    • It originates when visiting a website, the web server sets a cookie in the browser of the client. It will be associated with that webpage and will be stored in request headers. Looks like this:
      Set-Cookie: cookieName=cookieValue; expires=Fri, 31 Dec 2023 23:59:59 GMT; path=/; SameSite=Lax
    • Cookies have expiry date or maximum age. If not specified, they are deleted at the end of the session. GDPR recommends reasonable expiry dates and requires consent for non-essential cookies. The selection of refusing cookies is a cookie itself. max-age=3600, it means the cookie will be valid for one hour.
    • When revisiting the website, the cookies are put in the headers of the HTTP requests. Web server can interpret the cookie to return personalised information.
  • Essential cookies are related to session states, and user authentication. They are needed for the website to function correctly.
  • Non-essential cookies are related to data collection and advertising.
  • There are wordpress plugins that handle them automatically, that’s why there is not much about them online.

By Doc

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