Grid (spatial index)

Imagine you have a big piece of paper and lots of stickers to put on it. You want to make sure each sticker is in the right spot on the paper so you can find it easily later.

A grid is like a big piece of paper that's been divided into lots of little squares. Each square has its own spot on the grid, and each sticker gets put in the square that matches where it is on the paper.

This grid is used by computers to help them find things quickly, just like you can find a sticker on the grid quickly because you know which square it's in. This kind of grid is called a spatial index because it helps you find things based on their location in space (on the paper) instead of just random order.

So, a grid (spatial index) is like a big piece of paper divided into little squares that helps computers find things based on where they are in space.