Whenever you use the
element, anything following it starts from the next line. This tag is an example of an empty element, where you do not need opening and closing tags, as there is nothing to go in between them.

The
tag has a space between the characters br and the forward slash. If you omit this space, older browsers will have trouble rendering the line break, while if you miss the forward slash character and just use
it is not valid in XHTML.

Example:

Hello
You delivered your assignment ontime.
Thanks
Mahnaz

Result:

Hello
You delivered your assignment on time.
Thanks
Mahnaz