1. Why did Poisson invent the Poisson Distribution?
To predict the number of events that will take place in the future!
More precisely, to predict the probability of a specific number of events occurring within a fixed time interval.
If you have ever sold anything, this “event” could be defined as, for example, a customer making a purchase (the moment of truth, not merely browsing). It could also be how many visitors you get on your website a day, the number of clicks on your ads in the coming month, how many phone calls you receive during your shift, or even the number of people who will succumb to a fatal disease next year, and so on.