This sheds some light @ADernild. Thank you.
But I saw set.seed(123) in an example, so essentially it could've been any number instead of 123 used?
Is 123 just a number to recall the same set of random numbers used?
Could the example have used 321 instead for the same purpose?
If I was writing the code in a script, would I want to use a specific number or any number is fine just as long as it is noted for use if I'd like to use same sequence again?