Integrated marketing communications began as a response to a fragmented industry. Advertising, public relations, direct marketing and sales promotion were bought from separate agencies, briefed separately and judged on separate metrics. Schultz, Tannenbaum and Lauterborn (1993) argued instead that communication should start from the customer and be planned as one programme, so that every contact a person has with a brand reinforces the same few ideas.

The idea has since been read in two quite different ways. The weak reading treats integration as consistency: the same logo, line and key visual everywhere, sometimes dismissed as "matching luggage". The strong reading treats it as integration of roles: each channel does a different job, in a planned sequence, towards one objective. A video builds fame, a press story lends credibility, a search ad captures existing demand and an email converts a past customer. What they share is a proposition and the distinctive assets developed in Module 3, not identical copy.

A postgraduate planner should also name IMC's limits. It is easier to define than to measure; it assumes an organisation can coordinate budgets, agencies and departments that often compete; and on algorithmic platforms, where customers and creators remix brand content, a brand controls far less of its "one voice" than the 1993 model implied.

The PESO model offers a practical map for the strong reading. Popularised by the communications practitioner Gini Dietrich (Dietrich, 2014), it sorts media into paid (bought exposure), earned (coverage and advocacy you win), shared (social platforms and communities) and owned (your website, email list, shops and packaging). The overlaps matter most: a paid boost for an owned article, or an earned review that customers then share. Mapping a brand's channels this way quickly shows whether it is paying for almost all of its attention, or has built owned and earned assets that paid media could amplify.

The classic account of how a message works is the hierarchy of effects: people move step by step through awareness, knowledge, liking, preference and conviction to purchase (Lavidge and Steiner, 1961). It is intuitive and still shapes briefs and funnels, including the customer funnel this course assumes you know. Yet after reviewing more than 250 articles and books, Vakratsas and Ambler (1999) found little support for any fixed sequence. Cognition, feeling and experience interact, and in low-involvement categories people often buy first and form attitudes afterwards. Treat the hierarchy as a checklist of effects a campaign might need, not a timetable.

The evidence on emotional versus rational content is stronger than many planners realise. Analysing campaigns in the IPA Effectiveness Databank, Binet and Field (2013) found that emotionally led campaigns produced more, and larger, business effects than rational, message-led ones, particularly over the long term, while rational persuasion was better suited to short-term responses. The finding fits memory-based accounts of brand growth: emotional, distinctive work gets noticed and builds the memory structures that make a brand easier to think of in buying situations (Sharp, 2010). That does not make information worthless. A considered purchase such as a £220 waterproof jacket still needs a credible reason to believe, and activation close to purchase is often properly rational: price, stock and delivery.

Message strategy therefore means making three decisions: the single idea people should take away, the roles emotion and information will each play, and the proof that makes the idea believable. It sits between positioning and execution. The position you built in Module 2 says what the brand stands for; the message strategy says what this campaign will make people feel and believe; the creative team decides how to say it. A message strategy that tries to say four things usually communicates none of them.

Once the message is set, the media plan decides who will encounter it, how often and when. Reach is the share of the target audience exposed at least once; frequency is the average number of exposures among those reached. Because most brands' sales depend heavily on large numbers of light buyers who think about the category rarely, Sharp (2010) argues that growth comes mainly from reaching more people rather than hammering existing customers. Binet and Field's later analysis of media in the digital era reached a compatible conclusion: broad-reach media remained central to brand building, and digital channels tended to amplify rather than replace them (Binet and Field, 2017).

Sequencing turns a channel list into a plan. Brand-building activity runs wide and long, creating memories before people are in the market; sales activation targets people who are ready to buy, close to the moment of purchase. For a seasonal brand the order matters: fame has to be built before the weather turns, not at the same time as the discount.

The balance between the two is the most argued-over number in marketing. Binet and Field (2013) found that brand-building effects build slowly and last, while activation effects are immediate and short-lived, and suggested that around 60% of spend on brand building and 40% on activation was a sensible guide. Effectiveness in Context refined this (Binet and Field, 2018): the overall optimum in their data sat close to the original, at about 62:38, but it varied with the category, the brand's situation and the way people buy. The ratio is therefore a starting hypothesis to justify for your context, not a rule. It also rests on IPA award entries, a sample skewed towards successful campaigns, so treat it as evidence of what tends to work rather than a law.

The craft of each channel — content marketing, social media marketing and paid advertising — is the work of channel specialists; here the task is to orchestrate them. How to measure whether the split worked will be the subject of Module 7.

The creative brief is where strategy becomes instructions. A good brief sets out the background and business objective, the communication objective, the target audience and an insight about them, a single-minded proposition, the reasons to believe it, the tone, the mandatories, the channels and how success will be judged. An insight is not a statistic but a human truth that reframes the problem; the proposition is the one thing the work must communicate. Single-mindedness is the brief's discipline: every extra message dilutes the others, so secondary benefits become reasons to believe rather than rival claims. Tone should follow the verbal identity from Lesson 3.3, and mandatories must include regulatory limits: in the UK, the CAP Code requires marketers to hold evidence for objective claims before they publish them.

Pre-testing checks work before money is spent. Qualitative testing explores how people read a rough idea; quantitative testing predicts attention, emotional response and, crucially, whether viewers remember which brand it was for. Binet and Field (2013) argue that recall and persuasion scores can reward rational, message-heavy work, the kind the evidence in Lesson 4.2 suggests builds brands less well, so choose measures that fit the objective and use testing to improve work rather than simply to kill it.

AI now reaches into both stages. It can cluster thousands of reviews and social posts into themes, draft audience profiles, generate "synthetic respondents" that answer surveys as a described consumer would, and predict attention or emotional response to draft creative. The limits are real. Reviewing studies of these "silicon samples", Sarstedt et al. (2024) found that their agreement with human responses varied considerably by domain, and that their answers can be less varied than real people's and can caricature the groups they are meant to represent; they recommend them mainly for early, exploratory stages. Predictive tools trained on past advertising may also penalise genuinely new work. Use AI to generate hypotheses and speed up analysis, then validate with real people, and keep customer data within UK GDPR.