The International Phonetic Alphabet (IPA) is a system of phonetic notation devised by linguists to accurately and uniquely represent each of the wide variety of sounds (phones or phonemes) used in spoken human language. It is intended as a notational standard for the phonemic and phonetic representation of all spoken languages.
This page gives a general overview of the symbols used in the IPA. As it is used for all languages, it would be impractical to explain to English speakers how to pronounce all of the sounds. Therefore, the symbols are grouped based on the features they have, or the parts of the mouth used to pronounce them. A dental consonant, for example, is pronounced using the teeth, while a bilabial consonant uses both lips.
Pages explaining the pronunciation of individual languages can be found in Category:Pronunciation by language.