ELI5: Explain Like I'm 5

Data compression

Data compression is like packing your things in a small bag when you're going on a trip. Imagine you're going camping and you have a lot of things to take with you. If you just put all your clothes, tent, and other items in a big suitcase, you may not be able to carry it properly. It will be too heavy and even difficult to move around.

So, what do you do? You pack everything inside small bags, fold your clothes neatly, roll the sleeping bag tightly and put everything inside a backpack. This way, you'll be able to carry everything you need with ease.

In the same way, data compression helps to make files smaller and easier to store, send or share. When you take a photo or make a video, it creates a file with a lot of information. This information takes up space in your device, hard drive, or memory cards. If you want to send this file to someone else over the internet, it takes a lot of time because the file is too big.

Data compression makes it possible to reduce the size of these files by removing the unnecessary information. It works by creating a smaller version of the file that can be uncompressed and used again later. This process involves different compression techniques like lossless and lossy compression.

While lossless compression retains all the original data, lossy compression removes some of it. Lossy compression is like throwing away some of your clothes when packing for camping. You still have everything you need, but not everything is exactly the same as before.

In summary, data compression is a way to make files smaller by removing unnecessary information. This makes it easier to store, transfer, or share files, just like packing your camping gear inside small bags makes it easier to carry around.