Chips are a control system that happens to look like money
Converting cash into chips is usually explained as a convenience for the dealer, which is true and incomplete. Chips make a table countable at a glance, they make theft obvious, and they confine a game's currency to a space the operator controls. They also have a well-documented effect on the person holding them: a stack is psychologically easier to commit than the equivalent in notes, which is not a conspiracy but is worth knowing about yourself before you sit down. The cash desk is where both conversions happen, and it is the one point in the building where the abstraction breaks and the numbers become real again.
What the separation does
Two of these are operational, two are about you. All four are easier to handle once named.
A table becomes countable
Denominations are colour-coded so a supervisor can read a table's state without counting individually. That is the operational reason chips exist at all.
Abstraction lowers resistance
Committing a chip feels different from handing over a note of the same value. Knowing that is happening does not stop it, but it does let you set a limit before it starts.
The desk is where records are made
Larger exchanges generate records, and identification may be requested. This is a licensing requirement rather than a judgement about you.
Colouring up is a natural stopping point
Consolidating a stack into higher denominations forces a pause and a look at the actual total. Used deliberately, it is the most useful moment in a session.
Questions people actually ask
Why might the cash desk ask for identification?
Licensed operators in Great Britain have obligations around identity verification and, in some circumstances, establishing where funds have come from. Those obligations are triggered by the transaction and by the operator's own thresholds, not by anything about you personally. It is routine, and it applies across the licensed market rather than at one brand.
Can I take chips out of the building?
Chips are the property of the operator and are intended to be exchanged back at the desk before you leave. Beyond the practical point that they are worthless elsewhere, walking out with them creates exactly the kind of untracked value the chip system exists to prevent.
Is there a reason to set a limit before arriving rather than during?
Yes, and it is the same reason limits work better in advance online. A decision made before you are in the environment, holding an abstracted currency, in a room designed to be pleasant to stay in, is a decision made under different conditions from one made two hours in. The number itself matters less than when you chose it.