Creatives: An Overview
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Types of Creatives
There are many kinds of creatives used on the Internet. Some of the key types include:
- Banner ads - Text or image ads that appear above or alongside content.
- Expandable ads - Ads that can be enlarged beyond their initial dimensions, often by user interactions such as scrolling down the page or mousing over the ad.
- Pop ads - Ads that display in a secondary browser window. Pop-up ads display in front of the initial browser window, while pop-under ads display behind it.
- Video ads - Video ads may play before, during, or after the main video content. You can see examples of this type of ad on YouTube and Hulu.
- Mobile ads - Mobile ads may be in-app ads or web ads that are optimized for display on mobile devices.
Creatives and Impressions
An impression is the display of a single creative to a single user at a certain point in time. Sometimes serving a creative and serving an impression are essentially the same thing, but often the server deciding which advertiser should display a creative, the server deciding which creative should be shown, and the CDN (content delivery network) that actually hosts and returns the creative image file are all different. In this case, the act of serving an impression and the act of serving the creative are two different events. In reporting, no matter how many servers are involved, the number of impressions and creatives served should match, if all went smoothly.
This is a simple example of an advertiser that uses a CDN (Content Delivery Network) rather than an ad server to host its creatives.
Here's how it works:
- When the user visits a publisher web site, the browser sends an ad tag to the ad server. This ad tag contains information about the user and the ad placement.
- The ad server optionally passes an ad tag to a third-party data provider to retrieve information about user segmenting or contextual targeting.
- The ad server then passes an ad tag to the advertisers. Depending on the publisher-advertiser relationship, this may mean simply directly requesting ads for guaranteed buys, or it may involve requesting bids from multiple advertisers and carrying out an auction to determine the most profitable result for the publisher.
- The ad server returns an ad tag with a creative URL to the browser.
What are CDNs (Content Delivery Networks)?
A Content Delivery Network is a huge network of servers located across the globe that exist to deliver static content quickly. Most advertisers prefer to have all their creatives served from a CDN in order to simplify reporting and creative updates. Advertisers may work with manydifferent networks, exchanges, publishers, or platforms, and if creatives were hosted by each of these, their reporting data would be scattered. In addition, the advertiser may want to maintain control over its creatives and probably wants to independently verify that its creatives are being properly served. With a single ad server, the advertiser can compare impression numbers with its partners to make sure everything is working correctly.
Occasionally, an advertiser will use the ad server to host creatives instead of a separate CDN. Possible reasons include:
- A desire to minimize redirects and latency
- The publisher may ban third-party tags because such tags can rotate creatives and be generally hard to audit
Tracking Clicks and Conversions
Advertisers and publishers may also want to track a creative's performance. For display advertising, this typically means tracking clicks and conversions.
- Clicks - When users click on a creative, they are directed to a landing page. For example, they see an ad for Prostarr Sportswear, they click on the ad, and they are directed to prostarr.com/summersale. These clicks can be tracked by either a pixel on the landing page or a URL associated with the creative. If you track clicks through a pixel, the pixel fires when the landing page loads. If you track clicks through the creative URL, the creative URL directs the browser to a click-tracking server before redirecting it to the landing page.
- Conversions - The user performs some desired action such as making a purchase or signing up for membership. This can happen immediately or during a specified "lookback" period, if advertiser and publisher agree to count the user as a conversion as long as they perform the action within that time period. Conversions may also be called acquisitions. They're generally tracked through a pixel on the confirmation page for the action (for example, the confirmation that users see when they've purchased items or signed up for mailing lists).
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