In HTML, Some characters are kept reserved .

when you are using the less than (<) or greater than (>) signs in your text, the browser can possibily mix them with tags.

Character entities are utilised for displaying reserved characters in HTML.

A character entity will appear like this:

for displaying a less than sign (<) we must write: < or <

A common character entity which is predominantly used in HTML is the non-breaking space: &nbsp;

A non-breaking space can be said as a space which will not be breaking into a new line.

Two words that are separated using a non-breaking space will stick together (i.e not break into a new line). This is useful and handy while breaking the words might become disruptive.

Examples:

• § 10
• 10 km/h
• 10 PM

Another common usage of the non-breaking space is prevention of browsers for truncating spaces in HTML pages.

If you are using 10 spaces in your text, 9 of them will be removed by the browser.For adding real spaces to your text, usage of &nbsp; character entityis helpful.