When I put together guides I'm inevitably summarising, reducing, a wide range of material; if you want to look deeper, this (and the Library/classroom resources!) is a good starting point.
Rob Carlton (senior OCR examiner) Medi@CHS blog
Rob is a useful source, as someone involved in the syllabus design for OCR, and his school blog has lots of useful links.
Hendry, Steph (2015) "Two Key Concepts: The Relationship Between Audience and Institution", in Media Magazine, April 2015.
The link above requires a login (ask myself or Librarian). Much of the analysis below is my own, but linked to Hendry's points.
Nice example of how large conglomerates integrate seemingly contrasting brands:
According to one definition, brand = product + personality. Knowing the brand means that the audience can feel reassured when they access a product produced by a familiar, wellloved brand. Consider the ‘personalities’ constructed by two very different institutions: Disney and Marvel. Both are associated with blockbuster film, but our expectations of their products may be quite different.