Ok kiddo, have you ever heard of measuring things like height or weight? A software metric is kind of like that, but it's used to measure something about computer programs.
You see, when people create software, they want to know things like how complicated it is, how many errors it has, and how long it takes to run. These are all things that a software metric can measure.
Metrics work a bit like a ruler or a stopwatch. You use them to measure something specific about the software. For example, if you want to measure how long it takes for a program to run, you would use a metric that counts the amount of time it takes for the program to finish.
Metrics are important because they help people understand how good or bad a piece of software is. By measuring things like how many errors a program has, developers can find ways to make it better and fix any problems.
So, to sum it up: a software metric is a tool used to measure different aspects of a computer program, like how complex it is or how long it takes to run. It helps people understand how good or bad the program is and find ways to improve it.