Clear search
Close search
Google apps
Main menu

Identify your inventory

This article walks you through how to identify the advertising opportunities, or inventory, on your website and how to build out that inventory in DFP Premium.

Ad units

Imagine printing a hard copy of your home page and cutting out all of the ads. Each empty space is an opportunity to advertise. DFP defines each space, or similar spaces appearing throughout your website, as an ad unit. Ad units are also used to represent video and mobile inventory.

Conceptual image of how ad units appear on a page

Ad units can be reused across different web pages, reducing the need to create unique ad units for every single ad space on your website. You can use key-values to further distinguish between individual ad spaces instead.

DoubleClick for Publishers supports five levels of ad unit hierarchy. Organizing your inventory hierarchically enables you to:

Easily target a line item to your entire website (RON or Run of Network)
Level 1: Sports (automatically targeted)
Level 2 Baseball (inherits targeting)
Level 2 Baseball (inherits targeting)
Level 2: Football (inherits targeting)
Level 2: Hockey (inherits targeting)

Level 1: Finance (automatically targeted)

Level 1: Weather (automatically targeted)
Target an ad to a specific section of your website (ROC or Run of Category)

Level 1: Sports (targeted)
Level 1: Finance (not targeted)
Level 1: Weather (not targeted)

Easily target all of the children of a specific ad unit (ROC or Run of Category)
Level 1: Sports (targeted)
Level 2: Baseball (inherits targeting)
Level 2: Football (inherits targeting)
Level 2: Hockey (inherits targeting)
Separate logically or physically distinct inventory (ROS or Run of Site)
Level 1: Website A (targeted)    
  Level 2: Sports (inherits targeting)  
    Level 3: Baseball (inherits targeting)
    Level 3: Football (inherits targeting)
    Level 3: Hockey (inherits targeting)
  Level 2: Finance (inherits targeting)  
  Level 2: Weather (inherits targeting)  
Level 1: Website B (not selected)    
  Level 2: Xbox 360 (not selected)  
  Level 2: PS3 (not selected)  
  Level 2: Wii (not selected)  

Your website might include a handful or a couple hundred of ad units. It would be tedious to sell these individual ad units to advertisers. You can group logically associated ad units into placements. A placement is a group of related ad units that might interest advertisers.

Common examples include a placement for all of the leaderboards on your site, a placement for all of the seasonal ad spaces on your site, or a placement for all of the homepages in your network if you own multiple websites.

You can protect expensive, sensitive, or strategic inventory from "flow-down" targeting by marking it as a special ad unit.

Common examples include inventory that you sell at a premium like your homepage, areas within your site that are contextually sensitive like your landing pages, and other isolated areas of your website that get a lot of traffic.

Ad tags

An ad unit defined within DFP doesn't do anything until you link it with your website using an ad tag. When a user views a page on your website, the ad tag, which is just a snippet of code, makes a call to DFP and fetches an ad for display.

The Google Publisher Tag supports SSL and asynchronous rendering, and has a single request architecture for faster and more secure page loads. (Learn more about Google Publisher Tags)


Design your website's inventory

Now that you’ve identified your inventory, it’s time to design your ad unit hierarchy and the key-values that you will be using.

Was this article helpful?
How can we improve it?