True freedom for any writer comes in the form of an informal essay. The writer has the liberty to test their creative abilities and express their thoughts with freedom. Without any specified guidelines or rules to adhere to; informal writing is the purest form liberalized writing in which you can explain a point of view on a matter or a judgment made on the basis of personal experience.
Now in a conversational tone the writer has to present an inspiration, recollection, choice, occasion or situation. Now in an informal essay one is supposed to take on a conversational tone which resembles a care free manner. Now keep in mind that the language you use in your informal essay can be relaxed but the structure and layout should be well grounded. Just because you are writing an informal essay does not justify sloppy or disorganized formatting and lay out.
In essence you have to communicate your persona in the composition of your informal essay. Now content of your informal essay can take a comedic tone or be serious in its approach. You are completely free as a writer to write on fictional foundations or actual events in your informal essay.
Your informal essay can lax the rules and regulations governing the time space continuum. The key to a quality informal essay is having the ability to produce original and creative work with your personality making the informal essay unique. The only necessity of an informal essay is that what ever you write has to entertain the readers.