The charsets page gives some background information about using Unicode in web pages, with a focus on the difference between the (old) Macintosh character set and the Windows character set.|
Named entities like é can be useful to encode special characters on web pages. How to use them is explained on the NamedEntities page.
The page entitiesTips has a lot of tips for encoding special characters successfully in web pages.
UTF-8 is an encoding scheme for using all kinds of Unicode characters on one page. On the utf8conversion page is explained how a Unicode character position can be converted to a UTF-8 code and back.
NL: Uiteenlopende informatie over het gebruik van Unicode in webpagina's.