Okay so imagine you have a toy and you play with it every day. And then one day, your mommy or daddy buys you a brand new toy that you've never played with before. This is kind of like what a new IP is.
An IP, which stands for intellectual property, is something that someone creates like a book, video game or movie. When someone creates a new IP, it means they are making a completely new thing that nobody has seen before.
Just like how you get excited to play with a new toy, lots of people get excited when a new IP is announced or released because they want to see what it is all about. Sometimes new IPs become really popular and everyone wants to play with them or watch them.
So basically, a new IP is like a brand new toy that someone made and everyone is really excited to see it and play with it for the first time.