Have you ever played with building blocks? Let's say you have a bunch of different shapes and sizes of blocks that you want to use to build a tower. But before you can build it, you need to make sure that all the blocks are lined up properly.
The Gram-Schmidt process is like putting your building blocks in order. It's a way to take a bunch of different vectors (which are just like blocks, but instead of physical objects, they're arrows pointing in different directions) and line them up in a neat and orderly way.
Here's how the process works: let's say you have two vectors - we'll call them x and y. First, you take x and just leave it as is. Then you take y and "project" it onto x. This means that you take y and figure out how much of it is in the same direction as x (think of it like finding the shadow that y casts on x), and you subtract that shadow from y. This gives you a new vector, which we'll call y1.
Now you have two vectors - x and y1 - but they're not quite lined up perfectly yet. So you repeat the process: you take y1 and project it onto x, just like you did with y. This gives you another new vector, y2. And you keep going like this, projecting each new vector onto all the old vectors, until you've gone through all the vectors you started with.
At the end of the process, you'll have a set of vectors (x, y1, y2, etc.) that are all lined up in a neat and orderly way. This is useful because it can help you do things like solve equations or understand how different systems (like electrical circuits or chemical reactions) interact with each other.
So just like how you need to put your building blocks in order before you can build a tower, mathematicians use the Gram-Schmidt process to put their vectors in order before they can do more complex calculations or solve problems.