When a promotion changes the media story

A sales spike during a campaign can make the advertising look brilliant. But if the price or offer changed at the same time, media may be getting too much credit.

Promotions can bring purchases forward, attract deal-seekers, change the product mix or persuade existing customers to buy more. Media can amplify the offer. The result is a combination of price, promotion and advertising, not a clean media effect.

If measurement cannot separate them, the next budget decision may be based on the wrong story.

Promotions can drive a large share of sales

Research across 15 ecommerce and direct-to-consumer brands found that promotions drove an average of 24% of revenue. For the most promotion-led businesses, the figure reached about 45%.

That does not mean every promotion produces the same result. It does show that promotions are too important to treat as a footnote.

Why performance media can get too much credit

Brands often increase paid search, retargeting and social activity when an offer goes live. At the same time, more customers search, click and buy.

If measurement sees the media but not the offer, it can credit the sales increase to the channels closest to conversion. Performance media then looks stronger than it really is, while brand and upper-funnel activity can look weaker.

That can push more budget towards channels that capture demand rather than create it.

Measure the offer properly

A simple promotion flag is rarely enough. A 10% discount is different from a 40% clearance. Free delivery, bundles, loyalty rewards and marketplace vouchers can all change behaviour in different ways.

• When the offer started and ended
• Which products, channels and markets were included
• The real discount customers received
• Stock levels and availability
• New and returning customer sales
• Revenue, margin and repeat purchases

The right level of detail depends on the decision. A national budget review may need less detail than a retailer deciding which category offer to repeat.

Look beyond the sales spike

A promotion may raise sales but reduce margin. It may bring next week’s purchases forward. It may attract valuable new customers, or simply discount sales that would have happened anyway.

• Did media create demand or simply capture it?
• Which channels still added sales after the promotion was separated?
• Did the offer deliver profitable growth?
• Did new customers return?
• What should we change next time?

The goal is not a more complicated report. It is a clearer decision about media, pricing, offers and timing.