Linguistics is, according to Merriam-Webster, "the study of human speech including the units, nature, structure, and modification of language." It is important to note that linguistics deals with the analysis of any language, not just English.

A lot of ground is covered in linguistics. Some topics include: the evolution of language, how do languages differ from each other, the structure of human languages, dialects, speech acts, pronunciation, historical linguistics, and even informal topics like "made-up" languages, puns, and how the internet has influenced our language.