How a title or description can be included in a table? Why is it useful?

The caption element can be used to include a title or description to a table. It is useful for screen reader devices, allowing them to give more information about the table to visually impaired people.

<table>
    <caption>Nutritional information about food served in our restaurant</caption>
    <thead>
        <tr>
            <th>Menu item</th>
            <th>Calories</th>
            <th>Fat</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Chicken noodle soup</td>
            <td>120</td>
            <td>2</td>
        </tr>
        <tr>
            <td>Caesar salad</td>
            <td>400</td>
            <td>26</td>
        </tr>
    </tbody>
</table>