In the What topics can I ask about here? 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 (whichever is earlier) — unless the question is asking how to upgrade to a supported release.
What are the meanings of the following terms:
- End of Standard Support (EoSS)
- Long Term Support (LTS)
- Extended Security Maintenance (ESM)
- End of Life (EoL)