Html Entities:

Some of contents are reserved in Html.
If you use less than (<) or greater than (>) sign ,browser might mix them with tags.
Character entities are used to display reserved characters in Html.
Character entities looks like:

To display less than sign you should use or write &lt; or &#60;
Advantage of using entity name instead of number is that name is easier to remember.

Non-Breaking Space:

Common character entity used is non-breaking space in html .i.e.(&nbsp;).
Remember browser will always remove space in Html pages. If you write 8 spaces in your text it will remove 7 of them.You can use &nbsp; character entity to add real space.

Some More Useful Character Entities:

Entity names are case sensitive.

Combinig Distinguishing Marks:

Distinguishing mark is "glyph" added to letter.
Some marks like grave ( ` ) and acute (  ́ ) are called accents.
Diacritical marks can appear both above and below a letter , inside a letter and between two letters.

Examples: