Some characters are reserved in html. For example, you cannot use the greater than or less than signs within your text because the browser could mistake them for markup.
Commonly Used Character Entities
Note: Entity names are case sensitive!
- non- breaking space( or  )
- less than (< or <)
- copyright (© or ©) etc
where one is entity name and other one entity Number
Note: Browser may not support all entity names while the support for entity numbers is very good.