e.g from developer version to the remote version (deployed) Or even if i have a GitHub repo and i initialize it with the password of mine etc.. can someone else clone it and work on it?

As long as you are committing the uSync files you can do an import manually or enable on startup. This can be an existing instance where it will apply updates or a fresh db

can i ask where i can learn more about them? And would this work for a v14 umbraco project

https://docs.jumoo.co.uk/usync/intro there is a 14 version so it should work, I have tried 14 much so don't know. But Kevin is great

Okay! thank you very much

This works fine in 14.