What is a Retail POS (X-Series) store address?

Question

What does the Retail POS login screen mean when it asks me for my store address?

Setup

•  Retail POS for Mac or PC

Answer

Your Retail POS store address is a unique string of characters which denotes your particular account.

• It will display in your browser's URL bar at the top i.e. storename.retail.lightspeed.app 
• It will not contain any spaces between the words
• It will not contain any punctuation

In this example the Retail POS store address is samsamazingstore