Licenses for Netflix?

Netflix has to get licenses for films and series, but what exactly is a license?
I also know that licenses are expensive and that is why Netflix does not have all seasons of the series available, for example, how expensive does such a season actually cost, as an example for Naruto / Shippuden?

Person or company A has the rights to the series / film and sells Netflix and Co a permit / license to broadcast the series or film for a certain period of time

Is different. Depends on customer behavior, whether a series is popular, etc. Or not

Here, a one-hour episode costs around 50,000 to 60,000 dollars, which can be transferred 1 to 1 in euro. Anime series can therefore be estimated at 5,000-25,000 euro per episode with a length of 30 minutes. Depending on popularity, of course. As a result, a season license with 12 episodes would cost 60,000 to 300,000 euro.

This info is around 5 years old. So maybe even more expensive today.

A license is the time-limited permission to use works or make them accessible to third parties.