This document discusses the field of sociolinguistics. It begins by defining sociolinguistics as the study of the relationship between language and society. The main areas studied in sociolinguistics are then outlined, including language varieties according to social class, region, and occupation. Additional topics covered are language contact between pidgins and creoles, language maintenance and shift, the causes and social aspects of language change, and approaches to language planning. In conclusion, sociolinguistics analyzes language use in real social contexts and considers language to be a social and cultural phenomenon.