Linear gradients in CSS can be used to change the color from one to another for backgrounds, buttons, or even text. They transition from one color to another in a straight line.
Here is an example of how you’d use it to set a background of a webpage to a linear gradient:
```
body {
background: linear-gradient(direction, color-stop1, color-stop2, …, color-stopN);
}
```
- “Direction” is the direction of the gradient, it could be a degree, like “90deg”, or a keyword like “to right” or “to bottom right”.
- “Color-stop” represents colors at different locations in the gradient. For example:
```
body {
background: linear-gradient(90deg, red, blue);
}
```
Or use multiple colors:
```
body {
background: linear-gradient(to right, red, yellow, green);
}
```
You can also optionally specify where each color starts:
```
body {
background: linear-gradient(to right, red 0%, yellow 50%, green 100%);
}
```
There are a lot more ways you can customize this, including adding transparency, using percentages instead of color names, and more, this is just a basic intro!