Imagine a big box of Legos, and each Lego is a different shape and size. Now, imagine that you take out all the Legos that are the exact same shape and size and you stack them up on top of each other until you have a big tower. That tower is a module, and the Legos that make it up are called a lattice.
A lattice module is kind of like that tower of Legos, but instead of Legos, it's a bunch of math stuff. The math stuff is made up of little building blocks called vectors, which are kind of like arrows that show direction and magnitude.
Now, imagine that you have a bunch of these vectors and you put them together in a certain way so that they make a pattern, like a grid. That grid is called a lattice, and the vectors are the building blocks that make it up.
Why is this important? Well, lattices come up in lots of different parts of math and science because they can help us understand how things are arranged or structured. For example, in chemistry, lattices can be used to describe the way atoms are arranged in a crystal. And in physics, lattices can represent the way particles move around in a solid or a liquid.
So, to sum it up, a lattice module is a bunch of little math building blocks called vectors that are arranged in a pattern, like a grid. Lattices are important because they can help us understand how things are arranged or structured in different areas of science and math.