Ad targeting options explained: GEO, platform, OS, browser and retargeting

Every impression a DSP sees comes with information about where and on what device it will be shown. Targeting lets you buy only the impressions that fit your offer. This article explains the main options and how to use them together.

Which targeting options are there?

The exact set depends on the platform. In the Wizads DSP you can target by country, platform, operating system, browser, retargeting and other options available in the campaign settings.

Country (GEO)

GEO is the most important setting. It defines the language of your creatives, the price level and often the legal rules for your offer. Separate campaigns by GEO rather than mixing many countries in one: it makes bids and results easier to manage.

Platform and operating system

Mobile and desktop users behave differently. App offers are clear — Android campaigns for Android apps, iOS for iOS — but even web offers often show different conversion rates by platform. Start with the platform where your landing page performs best, then test the other.

Browser

Browser targeting is useful for browser-specific products, and also as a quality tool: if one browser brings clicks without conversions, you can exclude it and watch whether results improve.

Retargeting

Retargeting shows ads to people who already interacted with you — visited the site, started a sign-up, watched an ad. These audiences are smaller but usually convert better. Combine retargeting with a frequency cap so that the same person does not see your ad too often.

Placement lists

Placement lists are the main optimization tool after launch:

• a blacklist excludes placements that spend without results or do not fit your brand;
• a whitelist limits a campaign to placements that already proved themselves.

Many advertisers run a broad test first, then move the best placements to a whitelist campaign with higher bids. See our guide to buying traffic.

How to combine targeting without killing volume

• Add one restriction at a time and watch how volume and cost per result change.
• Do not stack every filter at the start. A campaign with too many restrictions may barely spend.
• Split, do not overload. Two campaigns (for example Android and iOS) are easier to optimize than one with everything mixed.
• Check delivery daily at the beginning: if the campaign does not spend, loosen the targeting or raise the bid.

Targeting and traffic quality

Targeting decides who you reach; quality filters decide whether those impressions are real. Even perfect targeting cannot fix bot traffic, which is why platforms combine targeting with anti-fraud filtering and why you should track results with postback. More in ad fraud and traffic quality.

Frequently asked questions

What is the difference between targeting and segmentation?

In ad tech they mean almost the same thing: choosing which audience or impressions a campaign buys.

Does targeting make traffic more expensive?

Narrow targeting can raise the price per impression, because you compete for fewer impressions. But the cost per result often falls, because you skip impressions that would not convert.

Where are targeting signals coming from?

From the bid request that the seller sends for each impression, usually in the OpenRTB format: country, device, operating system, browser and other anonymous signals.