So imagine that you are in charge of taking care of a plant. You want to make sure that the plant is always healthy and happy. But how do you know if the plant is doing okay? You need to measure things like how much water and sunlight the plant is getting. This is kind of like what lm sensors do in a computer.
A computer also needs to be taken care of to make sure that it is running smoothly. But how do you know if the computer is doing okay? You need to measure things like how hot the computer is getting and how fast the fans are spinning.
This is where lm sensors come in. It's a little program that measures all these things and tells you if the computer is doing okay or if something needs to be fixed. Just like how measuring the plant's water and sunlight helps you take care of it better, measuring these things in a computer helps you to make sure it's working properly.