What are caches levels?

A cache is like a super-fast drawer in your room where you keep things you use often, so you don’t have to go all the way to your closet every time.

Think of your house as having different drawers:

• The first-level cache is like the drawer on your desk. It’s right there, and you can grab your pencil or eraser in a second.
• The second-level cache is like the drawer inside your closet. It's a bit further away, but still close, maybe it has extra pencils or colored markers.
• The third-level cache is like the storage room under your house. It has all the things you use less often, like old toys or holiday decorations.

When you're working on something, your brain (or computer) checks the first drawer first. If what you need isn’t there, it looks in the next one, and so on, until it finds what it needs. This way, everything stays fast and easy to find!