Purposes for Writing
There are many purposes for writing, and each purpose will come with a different style attached. Some purposes for writing might include, communicating something you want, communicating your understanding of ideas you already have, and/or exploring ideas you have not yet fully developed. Each writing purpose can have several forms of writing to help with the communication of ideas. Each format has different structures to organize the information. For more information on some common forms of writing, click the links above.
Audience/Situation:
As with any form of communication, you need to consider your audience and situation. You are going to change several elements of your wording, content, and format depending on many elements of your audience and situation.