Placement decides how often your scanner gets used. Here is how to choose the spot.
Follow the natural pause
Put the scanner where the customer already stops moving: the payment counter, the reception desk, the table while they wait for the bill.
Keep it at hand height
A tap point works best when a customer can reach it without leaning. Flat on the counter or upright on a stand at eye level both work well.
One per touchpoint
If you have several registers, chairs or service bays, give each one its own scanner rather than expecting customers to walk to a single spot.