A Practical Guide to Display Advertising
Display advertising delivers cheap, vast reach across the web — and mostly gets ignored. Here's what display is genuinely good for, how to target and buy it well, and how to measure it beyond the click.
Display advertising is the visual advertising that appears across websites, apps, and platforms — the banners, boxes, and rich media units that make up a large share of the open web’s advertising. It offers something no other channel does at the same cost: enormous reach, precise targeting, and the ability to put your brand in front of vast audiences cheaply. It’s also, famously, mostly ignored — which is why so many marketers misjudge it.
The key to display isn’t better banners; it’s understanding what display is genuinely good at, and measuring it by the right yardstick. This guide covers both.
Display’s real strengths (and weakness)
Display’s economics are unlike search: reach is cheap and abundant, but attention and intent are low. That makes it excellent for some jobs and poor for others.
What display is genuinely good for:
- Awareness and reach at scale — putting your brand in front of large or precisely-targeted audiences cost-effectively.
- Retargeting — the single highest-value display use, re-engaging people who already visited you.
- Top-of-funnel demand generation — introducing your brand to relevant audiences who aren’t searching yet, feeding demand other channels later convert.
Where display struggles:
- Direct, last-click response on cold audiences. Unlike high-intent search ads, cold display rarely drives immediate conversions. Judging it as a direct-response channel sets it up to look like a failure.
Understanding this split is the whole game: use display for awareness and retargeting, measure it accordingly, and it earns its place.
Banner blindness is real — design around it
People have learned to ignore anything that looks like a banner ad. Rather than fighting this with louder, more intrusive units (which breed resentment and ad-blocking), effective display accepts it:
- Don’t rely on clicks as the main value. Most of display’s influence happens without a click — brand impressions that shape later behavior.
- Design for the glance. Clear branding and one simple message beat cluttered, busy creative. In the split-second a banner is seen, simplicity wins.
- Respect the user. Non-intrusive, relevant ads preserve goodwill; annoying ones drive ad-blocker installs and brand damage.
Targeting turns waste into value
Because display reach is cheap, the risk is paying for oceans of irrelevant impressions. Targeting is what separates efficient display from spray-and-pray:
- Audience targeting — reaching people based on your first-party data, retargeting, or lookalikes. The most effective approach.
- Contextual targeting — placing ads on content relevant to your product. Surging in importance as privacy limits behavioral targeting; see contextual advertising.
- Careful placement — controlling where ads appear for relevance and brand safety.
Buying and quality control
Most display is now bought via automated programmatic advertising, which brings efficiency and precision but also real hazards you must manage:
- Ad fraud — bots generating fake impressions siphon budget; use fraud protection and reputable supply.
- Brand safety — automated buying can place ads next to objectionable content; use exclusions and safety tools.
- Viewability — an impression that never appeared on-screen is worthless; buy and measure on viewable impressions.
- Low-quality sites — exclude made-for-advertising sites built purely to farm ad revenue.
Unmanaged, these quietly waste a large share of display budgets. Managing them is not optional.
Measure display by the right yardstick
Judging display purely on click-through rate — the classic mistake — makes a channel that works for awareness look like it fails. Measure its real effects:
- View-through conversions — people who saw (not clicked) an ad and converted later; captures display’s actual influence.
- Brand lift — awareness and recall changes in exposed vs. unexposed audiences.
- Viewability and valid-impression rate — are real people actually seeing your ads?
- Retargeting performance — the direct-response slice, measured on profit and incrementality.
- Incrementality — the gold standard: did display genuinely add conversions, or claim credit for what would have happened anyway?
A practical starting plan
- Decide the job — awareness, demand generation, or retargeting — and set expectations accordingly.
- Start with retargeting — the highest-ROI display use, powered by your first-party data.
- Target tightly — audience or contextual targeting, not broad untargeted reach.
- Protect quality — fraud protection, brand-safety exclusions, and viewability tracking from day one.
- Measure beyond clicks — view-through conversions, brand lift, and incrementality, not click-through rate.
Frequently asked questions
What is display advertising?
Display advertising is the visual advertising — banners, boxes, and rich media — that appears across websites, apps, and platforms. It offers cheap, vast reach and precise targeting, making it well-suited to brand awareness, demand generation, and retargeting. It’s less effective as a direct, last-click response channel on cold audiences, where high-intent search advertising performs better.
Why are display ad click-through rates so low?
Because of banner blindness — people have learned to subconsciously ignore anything that looks like an ad. But low click-through doesn’t mean display fails; much of its value is in brand impressions and view-through influence on people who never click. Judging display purely on click-through rate misjudges a channel that works primarily for awareness and retargeting.
What’s the best use of display advertising?
Retargeting — re-engaging people who already visited your site — is the highest-ROI display use, because you’re reaching warm, interested audiences. Beyond that, display excels at cost-effective brand awareness and reach at scale, and at top-of-funnel demand generation. It’s weakest as a direct-response driver for cold audiences.
How should I measure display advertising?
Not by click-through rate alone. Use view-through conversions (people who saw an ad and converted later), brand lift studies, viewability rates (were ads actually seen?), retargeting performance measured on profit, and ideally incrementality tests to confirm display genuinely added conversions. These capture display’s real influence, most of which happens without a click.
The bottom line
Display advertising is a low-cost, high-reach channel that’s neither the useless relic its click-through rates suggest nor a direct-response engine. It excels at awareness, demand generation, and above all retargeting — when you target tightly, design for the glance, manage fraud and brand safety, and measure by view-through, brand lift, and incrementality rather than clicks.
Use display for what it’s actually good at, judge it by the right metrics, and it becomes a cost-effective complement to your higher-intent channels.
Keep exploring: learn about retargeting, programmatic, and contextual advertising, or browse the Digital Business Marketing Awards.
