Display advertising
Banners that bring visitors back — and new ones in.
Display ads appear on news sites, blogs and apps while people read, compare and shop. Use them to bring back visitors who left without buying, or to appear next to content that matches your business.
- Display
A paid service run by our team, separate from your JustCaster subscription.
At a glance
- Screens
- Websites and mobile apps
- Sizes
- 300×250, 728×90, 320×50, 300×600
- Buying
- CPM or CPC
- Best for
- Retargeting and traffic
How display advertising works
Every time a page loads, its ad spaces are sold in a split-second auction. Our buying platform bids for the people and the pages that matter to you — and only for them — across thousands of sites and apps.
The most profitable use is retargeting: most visitors leave a website without acting, and banners remind them of your offer in the days that follow. We also exclude unsafe sites and check that ads were actually visible.
- Article
- Banner
- Article
- Websites
- Mobile apps
- Retargeting
Ad formats
Medium rectangle
300 × 250
The most common size, inside articles and in sidebars, on desktop and mobile.
Leaderboard
728 × 90
A wide banner at the top of the page on desktop.
Mobile banner
320 × 50
A slim banner at the top or bottom of mobile sites and apps.
Native ad
Image + headline
Looks like the site’s own content recommendations, marked as sponsored.
Targeting options
Retargeting
People who visited your site or a product page.
Page topic
Pages about cooking, travel, sport, business and more.
Interests and in-market
People currently interested in what you sell.
Location and device
A city or a radius, mobile or desktop.
Location and radius
Display campaigns can target a distance around an address or a point — ideal to reach people near your shop while they read the news.
- Radius
- From 1 km (Google) up to 100 km (Amazon DSP)
- Around
- An address, a business or a map pin
- Example
- Shop → 5 km
How we run your campaign
Brief and tag
We install a tag on your website to build retargeting lists and track conversions.
Banners in every size
We design the banners from your visuals, in every standard size.
Brand safety
We exclude unsafe content and low-quality sites before launch.
Optimisation
We cut sites and sizes that don’t perform and raise bids where conversions come from.
What you see in your report
Display is measured on clicks and conversions, but also on visibility: we report how many impressions were actually seen.
- Impressions and viewability
- Clicks and click-through rate
- Conversions and cost per conversion
- Best sites and sizes
- Conversions after viewing, without a click
- Impressions
- 240,000
- Viewable
- 71%
- Clicks
- 960
- Conversions
- 48
Example figures
Budget and billing
Display is bought per 1,000 impressions (CPM) or per click (CPC), and is one of the most affordable channels. Retargeting budgets depend on how many people visit your site.
Media budget and management fee are always shown separately in your media plan and on your invoice.
What makes these ads work
- Keep the message short: logo, offer, button.
- Make every size readable on its own.
- Send people to the exact page of the product or offer.
- Cap frequency so you remind people without annoying them.
- Refresh the banners every few weeks.
Frequently asked questions
On which websites will my banners appear?
On sites and apps sold through ad exchanges, filtered by quality and topic. You can exclude sites and get the list of where your ads ran.
What is retargeting?
Showing ads to people who already visited your website, to bring them back. It needs our tag on your site and a cookie banner that collects consent.
Do you design the banners?
Yes. We create the full set of standard sizes from your logo, photos and offer.
Is display GDPR-compliant?
Retargeting and tracking only run for visitors who gave consent through your cookie banner. We help you set it up correctly.
How do you avoid bad websites?
With exclusion lists, brand-safety filters and viewability checks applied before and during the campaign.
Other advertising channels
All advertising channels Compare the seven channels and combine them in one plan.
Tell us your goal. We’ll come back with a media plan.
Channels, budget split and expected reach for your area — before you commit to anything.
Netflix is a trademark of Netflix, Inc. Prime Video and Amazon Ads are trademarks of Amazon.com, Inc. or its affiliates. YouTube is a trademark of Google LLC. Other names are trademarks of their respective owners. JustCaster is independent and not affiliated with them.