Pseudo-random number sampling is like picking different numbers from a hat, but the hat is not completely random.
Imagine you have a hat with a bunch of different numbers on little slips of paper. Every time you take out a slip, you write down the number on it and put it back in the hat.
However, the order you pick the numbers out is not completely random. Instead, there is a set pattern that dictates the order in which you pick the numbers. This pattern is called a "pseudo-random" sequence, and it's made to look random even though it's not truly random.
The reason why we use pseudo-random number sampling is that it's much faster and easier than using truly random methods. For example, if you wanted to pick a random number from 1 to 1000, it would be a lot faster to use a pseudo-random number generator that follows a certain pattern rather than trying to physically shuffle 1000 different numbers and pick one.
Overall, pseudo-random number sampling allows us to generate seemingly random numbers that we can use in simulations, probabilistic models, and other mathematical applications where randomness is needed.