A geometric distribution describes the number of trials needed for a single success in a sequence of independent Bernoulli trials. Each trial has the same probability of success.
Bernoulli Trial: An experiment or process that results in a binary outcome: success or failure.
Binomial Distribution: A discrete probability distribution describing the number of successes in a fixed number of independent Bernoulli trials.
Poisson Distribution: A discrete probability distribution expressing the probability of a given number of events occurring in a fixed interval of time or space.