I'm using the `<figure>` tag like this:

```
<!DOCTYPE html>
<html>
<body>
<figure>
 <img src="img.jpg" alt="image" width="204" height="220">
</figure>
</body>
</html>

```

But if I remove the `<figure>` tag it doesn't appear to make any difference. Can someone explain to me what the use of the figure tag is?