We, as living things, use many different things to communicate: body language, gestures, facial expressions, etc. But since we are humans, we can communicate in more complex ways than just that; we have spoken language, specifically English. Our language is so complex that it's not uniform/cut and dry for everyone. There are certain words that we, as a society, have determined are only to be used in formal or informal settings, as well as the syntax. For example, in a formal essay or presentation, jargon used on whatever topic is being presented is utilized in order for the speaker to be given some credibility by the audience. The speaker using words that only someone within a certain interest group would thoroughly comprehend demonstrates that the speaker themselves have been in that situation, and they know the language the interest group uses. However, this jargon is not limited to only formal use. Jargon such as slang and slang phrases are frequently used in informal settings, ...
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