If you read just the start of this text because it gets cited in the forum: There are screenshots here, please have a look at them before assuming you know what this is about. Thank you!
As they say, every hint has its history 
. Where were we? Ah, yes …
You are running /e/OS on your device and want to give info about your version to get support, or a simple answer to a question, or anybody else to confirm whether they can observe the same behaviour you observe? Sure …
Your device will of course be important info.
The /e/OS version you are running will of course be important info.
But there’s more:
For serious consideration or comparison by anybody else, it’s important to provide complete info about your /e/OS version:
Settings - About phone - Android version (← tap on it) - /e/ OS version (← long-tap it, copy it to clipboard *, include it in your post)
This has all the necessary info in one conclusive little text string, and everybody else will know immediately what to deal with exactly … /e/OS version number - Android version - Build number - build type (aka release channel) - your device in /e/OS terms … it’s all there.
Example:
I have a problem with the v1.5 update on my phone
About phone: SM-G960F
/e/OS version: 1.5-q-20221031230909-dev-starlte
Problem description: blah blah blah
(But please post this in the appropriate topic to get help, not here in this HowTo topic.)
* The long-tapping and copying to clipboard feature may only be available from Android 10 (q) on.
Why is this important?
An /e/OS version might be available or still in use based on several different Android versions for the same device at the same time. /e/OS refers to them as follows (e.g. in Releases):
n (or nougat) = Android 7,
o (or oreo) = Android 8,
p (or pie) = Android 9,
q = Android 10,
r = Android 11,
s = Android 12,
t = Android 13,
etc. (Google abandoned designating an official sweet name to the Android beta version codeletter from Android 10 on, /e/OS followed suit, Pie is the last full name seen in communication, after that it’s only letters or version numbers.)
/e/OS might be available in several build types (aka release channels), on end user devices most commonly “dev” and “stable”.
Occasionally there might be more than one build for the same /e/OS version for a device, which can then be distinguished by the build number.
This all can make a decisive difference when confirming issues, answering questions or comparing device behaviour with other users.
(This is a Wiki post, so feel free to edit it to keep it up-to-date or to improve it.)
- threads can go on for long before the version and device is finally determined.