Data locality

Data locality is like when you have your toys all in one place in your room, so it's easy to find them and play with them.
When we talk about data locality in a computer, it means that all the information that the computer needs to work with is stored in one place, instead of being spread out all over the place.
This is important because it means that the computer can work faster, because it doesn't have to spend time searching for the information it needs.
Just like when you have all your toys in one place, it's faster and easier to find the toy you want to play with.
So, data locality is like having all your things in one place, which makes it easier to find what you need and work more efficiently.