How to set the margins of a page in HTML with CSS?

You can use CSS to set the margins of a page in HTML. You should put your CSS code either in a style tag in your HTML document’s head section, or in an external CSS file.

Here is an example of how to do it:

```

Your content goes here.

```

This will set margin and padding to 0 for the whole body of the page (which includes all the content inside your `` tags).

Alternatively, if you’re using an external CSS file (for example, styles.css), you can do this:

```
body { margin: 0; padding: 0;
}
```
You have to include this CSS file in your HTML file:

```

Your content goes here.

```
In both “margin” and “padding”, you can insert any value you want. It is usually measured in pixels (px) but you can use any other CSS units.

Remember that “margin” adjusts the space outside the element border and “padding” adjusts the space inside the element border.