i ran openhab several years with untached itemm files. now i moved to latest openhab version cam somebody point me to a howto for tags or antother good ressource for what how they are used ?
So basically the question is, do you have a specific need for tags? If yes, then the documentation of the add-on/system for which you need the tags will explain which tags are used for what purpose.
If no, then there is no need to start using them.