Okay, let me try to explain ISO 25178 to you like you're five years old.
ISO 25178 is a set of rules that helps people measure the surface of things. You know how some things are smooth and others are bumpy? This set of rules tells people how to measure the bumps and dips on a surface very accurately.
It's like when you're drawing a picture, and you want to know how bumpy the paper is. You might use a pencil and run it over the paper to feel the bumps. But that might not be very accurate. ISO 25178 gives us special tools and techniques to measure the bumps in a better way.
By following these rules, we can see how smooth or rough a surface is, and how big or small the bumps are. This can be useful in lots of different industries, like manufacturing, where making things smooth is really important.
In summary, ISO 25178 helps people measure the bumps and dips on surfaces very accurately, by providing special tools and techniques. This helps us make things smoother and better in different industries.