Using a "worker" or "worker name" is often an option when you do pool mining. It is often exemplified by "rig1". But how do you create one, and what is its use?
In pool mining context a
worker is simply a machine that mines the blockchain.
A mining rig is a computer system used for mining bitcoins. The rig might be a dedicated miner where it was procured, built and operated specifically for mining or it could otherwise be a computer that fills other needs, such as performing as a gaming system, and is used to mine only on a part-time basis. wiki
Its a name to identify your machines when you connect it to a pool with a miner address. You can use the same mining address on different
rigs and identify them with
rig name, some pools show the rig name on the status page.