Talk about the the strategic(long term) goal of marketing is to translate business goals into reality, through the implementation of a marketing plan.
I would also talk about business goals, such as growth, rising market share, profit maximisation etc, and relate these to the strategies that the business could implement
For example, you could potentially set it out like this;
Executive Summary:
Strategy 1: (Channel Choice)
Define Channel Choice
How this strategy has been implemented at case study
The effect of strategy
Relate this back to the strategic role of marketing (e.g how does this help the business achieve its goals?)
Firstly, go to the HSC business studies syllabus
http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/business-studies-st6-syl.pdf
Look in the topic "Marketing"
Role of marketing
strategic role of marketing goods and services
Marketing strategies
* Relate the marketing strategies, cause and the
market segmentation, product/service differentiation and positioning
products – goods and/or services
– branding
– packaging
price including pricing methods – cost, market, competition-based
– pricing strategies – skimming, penetration, loss leaders, price points
– price and quality interaction
promotion
– elements of the promotion mix – advertising, personal selling and relationship
marketing, sales promotions, publicity and public relations
– the communication process – opinion leaders, word of mouth
place/distribution
– distribution channels
– channel choice – intensive, selective, exclusive
– physical distribution issues – transport, warehousing, inventory
people, processes and physical evidence
e-marketing
global marketing
– global branding
– standardisation
– customisation
– global pricing
– competitive positioning