HTML Guide for br

The <br> tag inserts a line break, and it’s self-closing so you can use either <br> or <br/> but </br> is invalid.

As the <br> tag is a void element, it doesn’t need a closing tag, so <br> is preferred to <br/>.

First line<br>
Second line is also valid but discouraged.<br/>
Third line is invalid</br>

A <br> element has been found in an invalid place within a <table> element.

For example, the following table has an invalid <br> between two <tr>, but the <br> that appears inside a <td> is valid.

<table>
  <tr>
    <th>Item</th>
    <th>Description</th>
  </tr>
  <!-- The following br is invalid -->
  <br>
  <tr>
    <td>Book</td>
    <td>
      <!-- The br in the following line is valid -->
      Title: HTML & CSS<br>
      Author: John Duckett
    </td>
  </tr>
</table>