This entry provides a brief overview of social semiotics. It begins with a brief historical account, presents some major texts and mentions some research which has contributed to the development of the theory. Key concepts are introduced, such as mode, interest, sign, design, semiotic work, text and meaning making. The issues of literacy and education are discussed under a social semiotic perspective, showing how these fields are related to each other. An example from teaching-learning practice is used to exemplify some of the concepts.