When programming, data is stored in variables. In a weakly typed language you define a variable and you can put anything in it. Numbers, text, whatever. In a strongly typed language when you define a variable you also have to define what it can take. If you define a variable that can hold numbers, it can only hold numbers and never text or anything else.
Weak typing makes code easier to write and more flexible while strong typing makes code more secure and harder to accidentally break. It’s mostly a preference thing in the end.
I’ve had a nebula subscription for a couple years, and honestly I don’t think the lifetime subscription is worth it. If you can find a deal on a year plan it’s crazy cheap, and I don’t think nebula is big enough to be certain it’ll still be relevant by the time a lifetime plan would pay itself off. Maybe if it got more popular, but its place as a more specialized type of video platform, and especially a subscription based one, makes me a bit doubtful that it’ll grow significantly any time soon.