Role & Purpose of Marketing
What Marketing Really Does
Most people hear ‘marketing’ and picture adverts. Adverts are part of it — but they are the last step, not the whole job. Marketing is everything a business does to work out who its customers are, what they want, and how to persuade them to buy. The OCR specification sets out four outcomes that marketing must achieve: identifying customers, understanding them, informing them, and increasing sales.
Think about Gymshark. The founder, Ben Francis, started in his parents’ garage in Bromsgrove in 2012. He did not begin with an advert. He began by working out who his customer was — young gym-goers who wanted fitted, stylish training clothes rather than baggy football shirts. He understood them by spending hours in gyms and on Instagram, listening to what they actually said. Only then did he inform them — through fitness influencers, not TV — and drive sales that grew from zero to more than a billion pounds in a decade. Each stage of marketing fed the next.
The Four Purposes of Marketing
The OCR spec names four things marketing must do. Every later marketing lesson — research, segmentation, the 4Ps — flows back to these four outcomes.
Identifying customers — working out who will buy the product. No business can please everyone, so it picks a target group first. LEGO identifies children aged 4–11 and their parents; Saga identifies over-50s; Aldi identifies price-conscious shoppers. Getting this wrong is the most expensive mistake a business can make — if the product is not for anyone specific, nobody will feel it is for them.
Understanding customers — once identified, the business has to learn what these customers actually need. Tesco does this through its Clubcard, which logs what millions of shoppers buy week by week. Small firms do it by talking to customers at the counter. Either way, the aim is the same: replace guesswork with evidence.
Informing customers — once the business knows the customer and the product fits, customers need to hear about it. This is where adverts, social media, shop windows and packaging come in. Monzo informed new customers mainly through word of mouth and a sharp orange card that looked different to every other UK bank card — cheaper than TV ads and far more memorable.
Increasing sales — the first three purposes only matter if customers actually buy. Marketing drives sales by matching the right product to the right customer at the right price in the right place — the four Ps we study in later lessons. Successful marketing turns interest into revenue.
The four purposes of marketing in the specification are: identifying customers, understanding customers, informing customers, and increasing sales. Every marketing decision a business makes should connect back to one of these four outcomes.
Why Identifying Customers Comes First
Before a business designs a product, sets a price or books an advert, it has to answer one question: who is the customer? Get that wrong and everything else — price, packaging, shops, adverts — misses the target. Research and development, manufacturing, packaging and launch adverts all cost money, and a product that nobody wants wastes every pound of it.
That is why identifying the customer is the first step in marketing. It reduces risk. The business commits cash only to products the market actually wants. A start-up selling vegan sports drinks in a rural farming town is less likely to succeed than one selling them in central London — not because the product is bad, but because the customer base is different. Identifying the right customer in the right place is the start of every good marketing plan.
Why Understanding Customers Matters
Identifying the customer is only half the job. The business also has to understand them deeply — their habits, their budgets, their values, the other products they already use. Greggs spotted that an older, lunchtime-focused customer base was shifting towards younger office workers looking for healthier and plant-based options. That understanding led to the vegan sausage roll in 2019 — a product that became one of Greggs’ best-selling lines and repositioned the brand for a younger crowd.
Understanding customers also feeds directly into the marketing mix. Once you know the customer, you can decide what the product should look like, what price they will pay, where they shop, and which adverts they will actually see. A business that skips this step guesses — and usually loses.
Marketing Drives Sales
The final purpose of marketing is also the one that keeps a business alive: revenue from sales. Without sales there is no business. Marketing does not replace a good product — if the product is poor, no amount of marketing saves it — but it does amplify a good one. A brilliant product no customers know about will fail; a good product matched to the right audience at the right price will sell.
The four purposes therefore sit in a chain: identify → understand → inform → sell. Break any link and sales suffer. A business that informs customers about a product they do not need loses the advertising cost for nothing. A business that understands its customers but never tells them about a new product misses the sales opportunity entirely. Good marketing strings all four together.
Marketing fails when any of the four purposes is skipped. Identifying without understanding leads to products nobody wants. Understanding without informing leads to great products nobody has heard of. Informing without identifying wastes money telling the wrong people.
Large firms can afford dedicated marketing teams, expensive research panels and national TV campaigns. Tesco spends tens of millions of pounds a year on advertising alone. A small independent bakery cannot match that — but it does not need to. It can identify customers by chatting over the counter, understand them by remembering their usual order, inform them through a local Instagram account and increase sales through loyalty cards and word of mouth. The four purposes apply to every business; the scale just changes.