Four steps: How Does an Ad Network Work
Step 1: Pooling Inventory From Publishers
An ad network collects unsold inventory from multiple publishers and stores it in a central location. The most popular ad networks, such as AdSense, only choose high-quality websites to work with so as to maintain ad inventory quality.
Some networks are less selective and work with a larger number of publishers with less or lower-quality traffic.
The selected publisher in turn puts an ad network’s tag or a snippet of code in their website’s HTML code.
Step 2: Getting Campaign Details From Advertisers
Ad buyers create a campaign in the ad network’s campaign management panel, or the ad network can manage the campaign on behalf of an advertiser or ad agency.
In both cases, the ad network needs to receive information from the advertiser, such as their target audience, budget and what kind of ads they want to display — e.g., image, video or text.
Step 3: Selecting the Right Inventory for Advertisers
Once the advertiser’s campaign requirements match the publisher data, ad details are sent to the publisher via the ad network’s ad server and with the help of the previously-inserted ad tag that is responsible for calling the ad.
Step 4: Tracking Ad Performance
Ad performance is tracked via the ad network’s tracking pixel, which is placed on the advertiser’s conversion page(s).
Ad networks earn money either by taking a portion of ad revenue or by initially marking up the inventory of the publisher. Publishers are primarily paid according to the number of ad clicks, impressions or conversions.