Stacks are a really cool way to organize data. They work on a simple rule called Last In, First Out (LIFO).

Think of it like a stack of plates. The last plate you put on the top is the first one you take off. That’s how stacks function!

There are two main actions you can do with stacks:

1. Push: This means putting an item on the top of the stack.
2. Pop: This means taking the item off the top.

There's also something called Peek. This allows you to see the top item without taking it away.

Stacks are important in computer science for a few big reasons:

• Function Calls: They help manage how functions start and finish.
• Undo Mechanisms: They are used in apps to go back on actions you’ve taken.
• Expression Evaluation: They are key for understanding expressions in programming.

From my own experience, once you understand how stacks work, they really make coding tasks easier and can help you solve problems better!