It is the so called "fair randomness" system, but I don’t trust it even a little bit. It is sus as fuck.
You can either set a new client seed provided by them, or manually enter one yourself. It will be matched with a new hashed server seed.
These two, combined with the nonce, will determine the results
When you set a new client seed, you can see the server seed you used before. Knowing your client seed and the server seed, you can check the results of your previous bets, as well as the outcomes you would have gotten if you had stayed on that seed, just by changing the nonce 1, 2, 3, 4, ... 200 ... 5000.
Think of the nonce as a round counter
Do they matter you asked, well, yes as i explained above. change it if you are loosing util you get a lucky one with results in your favor. But my advice play anything else but originals. It is a 100% balance destroyer 😂