In CSS, tags are used to select and style HTML elements. Here are some common CSS tags:
<ul>
<li><code>body</code>: Applies styles to the entire body of the document
</li>
<li><code>h1</code>, <code>h2</code>, <code>h3</code>, <code>h4</code>, <code>h5</code>, <code>h6</code>: Selects heading elements and allows you to style them accordingly
</li>
<li><code>p</code>: Targets paragraphs and allows you to style them
</li>
<li><code>a</code>: Used to select and style hyperlink tags
</li>
<li><code>img</code>: Targets image tags and allows you to style them
</li>
<li><code>ul</code>, <code>ol</code>: Targets unordered and ordered list elements respectively and allows you to style them
</li>
<li><code>li</code>: Targets list items within a list and allow you to style them
</li>
<li><code>div</code>: Used to create a container element that you can then style, often used for layouts
</li>
<li><code>span</code>: Similar to <code>div</code>, but used to select inline elements, such as text or images, rather than creating a container element
</li>
</ul>
Here's an example of applying styles to the <code>h1</code> and <code>p</code> tags:
<pre><code class="lang-css">h1 {
 color: red;
 font-family: Arial, sans-serif;
}

p {
 color: #333;
 font-size: 18px;
 line-height: 1.5;
}
</code></pre>
In this example, we're setting the text color and font family of all <code>&lt;h1&gt;</code> elements to red and Arial, respectively. For <code>&lt;p&gt;</code> elements, we're setting the text color to a darker gray, increasing the font size to 18 pixels, and setting the line height to 1.5.

In CSS, tags are used to select and style HTML elements. Here are some common CSS tags:

* `body`: Applies styles to the entire body of the document
 
* `h1`, `h2`, `h3`, `h4`, `h5`, `h6`: Selects heading elements and allows you to style them accordingly
 
* `p`: Targets paragraphs and allows you to style them
 
* `a`: Used to select and style hyperlink tags
 
* `img`: Targets image tags and allows you to style them
 
* `ul`, `ol`: Targets unordered and ordered list elements respectively and allows you to style them
 
* `li`: Targets list items within a list and allow you to style them
 
* `div`: Used to create a container element that you can then style, often used for layouts
 
* `span`: Similar to `div`, but used to select inline elements, such as text or images, rather than creating a container element
 

Here's an example of applying styles to the `h1` and `p` tags:

```css
h1 {
 color: red;
 font-family: Arial, sans-serif;
}

p {
 color: #333;
 font-size: 18px;
 line-height: 1.5;
}
```

In this example, we're setting the text color and font family of all `<h1>` elements to red and Arial, respectively. For `` elements, we're setting the text color to a darker gray, increasing the font size to 18 pixels, and setting the line height to 1.5.