“Randomness” defined by Wikipedia:
Different things in various fields. Commonly, it means lack of pattern or predictability in events.
Although randomness had often been viewed as an obstacle and a nuisance for many centuries, in the twentieth century computer scientists began to realize that the deliberate introduction of randomness into computations can be an effective tool for designing better algorithms.
In some cases such randomized algorithms outperform the best deterministic methods.
Luck is not as random as you think.
Before that lottery ticket won the jackpot, someone had to buy it.
― Vera Nazarian, The Perpetual Calendar of Inspiration