Okay kiddo, have you ever seen a circus tent that has big poles holding it up? Well, in the entertainment industry, a "tent-pole" is kind of like those poles. It refers to a big, exciting movie or TV show that helps to hold up the other smaller, less exciting ones.
Think of it like this - imagine you have a bunch of toys, like a big toy car and some smaller toy animals. The toy car is the tent-pole - it's big, exciting, and draws a lot of attention. The smaller toy animals are the other movies or TV shows. Even though they're not as exciting as the toy car, they're still important because they add variety and keep you entertained.
In the same way, a tent-pole movie or TV show is usually something that people really look forward to watching. It might be a superhero movie or a big action-adventure film. These types of movies bring in lots of money and lots of viewers, which helps to support the other, smaller movies or TV shows.
So, in summary, a tent-pole is a big, exciting movie or TV show that helps to support other, smaller movies or TV shows. It's kind of like a big toy car that draws everyone's attention, while the other toys (or shows) add variety and keep you entertained.