Cache

Imagine you have a busy day and you have to go to the supermarket. When you arrive at the supermarket, you see that there is a long line at the checkout. All the other customers have to wait in line to pay for their goods, which takes time.

But what if the supermarket suddenly implements smart technology that remembers which items you've bought in the past? When you walk into the supermarket, you no longer have to queue at the checkout and have your items scanned like the other customers. The system already knows what you have chosen because it remembers your previous purchases. You can simply pay and leave the supermarket without waiting in line.

This is exactly what caching does on the internet. When you visit a website for the first time, your computer or phone downloads all the images, text and information that make up the website. It's like standing in line at the supermarket checkout. But when you visit the same website again later, you don't have to download all the content again thanks to caching. Your device remembers the previously downloaded information and quickly shows you the website as if you walked straight into the supermarket, found your items, paid and walked out without waiting in line.