What is "seed"?

What does “seed” mean in Refinery? If “generation” means amount of times “population size” will execute then what “seed” is actually for?
All I was able to find was that Refinery Primer says: “Under Settings select a random seed (number) to initialize the randomization”
Does it mean that absolutely any number can be used?


If you want to reproduce the exact same results again, you have to use the same seed.