Importance and Functions of Kernel in Machine Learning - AI Objectives

What does the first thing come into your mind when you read or listen to the word kernel? In my mind, it's a post in the army or as computer scientist its operating system kernel that is responsible for the operation and manages the hardware according to given instructions. But Kernel in Machine Learning is something else, its somehow like operating system kernel that manage the function learned by some model/trainer with some experience/examples/data points. Now, here is the question of what actually machine learning is? And what is experience/examples/data points? Here we will try to answer all these questions.