What is Linguistics?

According to Professor David Crystal, Linguistics is the science of language. It is the subject whose practitioners devote their energy to understanding why human language is the way it is. They study the history, acquisition, structure, and use of as many languages as possible.
In general, Linguistics studies the nature of human language. It aims to uncover the general structure of natural language which is not dependent on individual languages and ways in which languages can be described. Moreover, the discipline examines the characteristics that separate human language from other sign and communication systems. Both in teaching and research, language is studied in a versatile manner from the level of sounds to complete sentences and texts, their meanings and entire spoken discourses. Moreover, Linguistics studies regional, social and temporal changes occurring in language, context-related use of language and production, and understanding processes of linguistic messages from the perspective of individual psychology.
Linguistics is the scientific study of human language. There are many approaches to the study of language, emphasizing different scientific traditions and aspects of the subject. Two broad divisions are the following: Theoretical Linguistics: the study of the structural properties of language, e.g., the rules or constraints that govern the formation and interpretation of words and sentences in the world's languages. Experimental and Applied Linguistics: the study of language in relation to a wide range of other fields of inquiry, from neuroscience and psychology, to language learning and teaching, to anthropology, geography and sociology.
Linguist is not necessarily someone who speaks several languages, or someone who advises people on the "correct" way to speak. Rather than prescribe proper usage, linguistics