The main reason for the use of ancillary texts (poster and a magazine review) is for marketing purposes. I started off by putting out a review to find out who are niche audience was and found out the film would be appealing mostly to females between the ages of 16-30.
With this in mind, I set about finding some inspiration and references for film with a similar genre to mine (an independent thriller hybrid) and the same type of niche audience. Some references included Twilight, Submarine and The originals. I looked at some posters and magazine reviews from these real media products and saw that what they did was release and appealing and mysterious high quality image/interview that allowed the audience to become interested in consuming the product but created just enough enigma so as not too much was given away. I think that this is therefore the main objective for my ancillary texts; as a method of promotion in order to engage and intrigue the audience into watching the film.
As well as this, I was able to find out more about distribution and genre. i.e. What is expected, what sells, what the viewer wants.