A term used to describe the technical aspects of writing, such as spelling, punctuation, capitalization, and abbreviations; refers to a set of rules which are designed to make the writing easy to understand. 

Additional Discussion:

Some people believe that paying attention to the mechanics of writing gets in the way of the creative flow, the essence of the writing process. However, according to “Grammarly Handbook,” (1)

The mechanics of writing play two parts: they aid in communication, and they show how much effort you’ve put into your work. The reader depends onsmall things like italics to identify the title of a book or a foreign word, and an apostrophe to differentiate between its and it’s. Even if the reader couldfigure out what was going on, typos and sloppy writing make it clear that the writer has no commitment to the work; if the writer has no commitment, whyshould the reader? As with anything else, the sum is only as good as the parts.

You, the writer, get to decide when to follow the rules and when to break them, but you have to know the rules first before you can make an educated choice. According to Donald Murray, a well-known writer who has written a great deal about the writing process, “The writer should not follow rules, but follow language toward meaning, always seeking to understand what is appearing on the page, to see it clearly, to evaluate it clearly, for clear thinking will produce clear writing.”