CSS animations allow you to animate HTML elements without the need for JavaScript. They consist of two main components:

1. Keyframes: Define the styles at various points during the animation.
2. Animation Properties: Control the timing, duration, and other aspects of the animation.

1. Define Keyframes: Use the `@keyframes` rule to specify the styles at different points in the animation. For example:```css@keyframes myAnimation {0% { background-color: red; }50% { background-color: yellow; }100% { background-color: green; }}```This example changes the background color from red to yellow to green.
2. Apply Animation to an Element: Use the `animation` property to bind the keyframes to an HTML element. For example:```css.myElement {width: 100px;height: 100px;animation-name: myAnimation;animation-duration: 4s; /* Duration of the animation / Timing function / Repeat the animation */}```This applies the animation to an element with the class `myElement`, making it change colors over 4 seconds.
3. Add to HTML: Ensure you have an HTML element to animate:```html

Here’s a complete example that animates a box changing colors:```html

CSS animations are a way to control the movement and appearance of elements on web pages. They are defined using @keyframes, which specify the styles at various points during the animation. The animation property is a shorthand that combines several properties, including animation-name, animation-duration, and others, to apply the animation to an element. CSS animations allow for dynamic style changes based on time, user interaction, or state changes, enabling developers to create engaging visual effects without JavaScript.