Twips, or "twentieth of a point", is a way to measure really small things on a computer screen. You know how you have a ruler at home to measure things like the length of your toy car or your pencil? Well, on a computer screen, things are even smaller than that, so we need a special way to measure them.
A twip is like a tiny dot that is one-twentieth of the size of a point. A point is a way to measure the size of a font or text on a computer screen. So, if a point is like a measuring unit in itself, then a twip is like a mini-measurement within the point.
For example, let's say you have a letter "o" on your computer screen. This letter is made up of pixels, which are the tiny dots that make up everything you see on your screen. But, because pixels are so small, it's hard to measure them accurately. Instead, we use twips to measure things like the size of the "o" or the distance between letters.
To put it simply, twips are like really, really, really small dots that are used to measure tiny things on a computer screen. They are smaller than a ruler and are only used for measuring things on a screen, not in real life.