In the [What topics can I ask about here?][1] article in Ask Ubuntu help center, under the "Questions that you should avoid:" heading, the following bullet point is mentioned:

> - Support for versions for Ubuntu releases [past their "End of Standard Support" or "End of Life" dates][2] (whichever is earlier) — unless the question is asking how to upgrade to a supported release.

What are the meanings of the following terms:
1. End of Life (EoL)
2. End of Standard Support (EoSS)
3. Extended Security Maintenance (ESM)


  [1]: https://askubuntu.com/help/on-topic
  [2]: https://wiki.ubuntu.com/Releases