The word "will" can have different meanings depending on the context, but in law, it usually refers to a legal document that tells people what should happen to their belongings after they die.
Imagine you have a big box of toys and you want to make sure that your friends and family each get something from it when you are no longer around to play with them. A will is like a set of instructions that tell people who gets what toy, how much each person gets, and when they can have it.
In a legal will, the person who writes it (called the "testator") usually starts by saying who they are and that this document is their last will and testament. They might then list all of their belongings, such as their house or their toys, and say who should get them. They might also say who should take care of any pets they have or who should be in charge of making sure everything goes according to plan.
Once the testator has written everything down and signed it, the will becomes a legally binding document that people have to follow after the testator dies. If someone doesn't follow the will or doesn't agree with it, they can usually challenge it in court.
Overall, a will is like a set of special instructions that tell people what to do with someone's belongings after they die. It's important for people to create a will so that their wishes can be respected and their belongings can be distributed fairly.