How to Serve Video Ads with Google Ad Manager?

Display ads may have dominated the advertising ecosystem for long. But now, with video ads in the picture, they might not be as impactful as before. The reason is simple- video ads commands attention. It’s a powerful storytelling medium that sticks. And Google Ad Manager has just supercharged its video ad tools. This means huge revenue potential for publishers like you.

Before we dive into creating epic video ads, let's master the basics - the Google Ad Manager's video ad formats. Understanding these options is crucial for maximizing your earnings.

This guide will break down the different video ad types available, helping you leverage them for optimal performance.

What Are The Different Types Of Video Ad Formats In Gam?

First things first. Before setting up video ads in Google Ad Manager, you must understand the different video ad formats available and where they can be served. Over the years, Google Ad Manager has expanded beyond traditional in-stream video to support a wider range of video placements that help publishers monetize more inventory.

Today, publishers can serve the following core video ad formats through Google Ad Manager:

• In-stream video ads
• Out-stream video ads
• Companion ads

Choosing the right format depends on your content strategy, inventory type, and monetization goals.

In-Stream Video Ads

In-stream video ads are served within a video player and remain the most common and premium video ad format for publishers with video content. These ads interrupt or appear alongside video playback and are typically delivered using VAST or VMAP via an IMA SDK-enabled player.

In-stream video ads can be:

Linear ads 

These ads play before, during, or after the video content.

• Pre-roll: Plays before the video starts.
• Mid-roll: Plays during natural breaks in longer video content.
• Post-roll: Plays after the video ends.

Linear ads command high attention and often deliver the strongest CPMs.

Non-linear ads 

These ads appear during video playback without fully interrupting the content.

• Overlay ads: Semi-transparent ads that appear over the video player, usually at the bottom.
• Non-overlay ads: Interactive or expandable elements displayed around the player while content continues playing.

Out-Stream Video Ads

Out-stream video ads are video ads that play outside of a video player, allowing publishers to monetize video demand even on pages without video content.

Common out-stream placements include:

• In-article or in-feed video ads
• Video interstitials
• Native and scroll-activated video placements

Out-stream video has become a key growth area for publishers, helping unlock incremental video revenue across editorial and non-video pages while maintaining user experience controls.

Companion Ads

Companion ads are display creatives that run alongside video ads. They typically appear near the video player or within the page layout and complement the main video creative.

Companion ads:

• Extend advertiser messaging beyond the video playback
• Provide additional monetization opportunities
• Are commonly used alongside both in-stream and out-stream video ads

Prerequisites for Serving Video Ads through GAM

To ensure smooth and scalable video ad delivery using Google Ad Manager (GAM), publishers must meet a few technical and operational requirements. These prerequisites are especially important for accessing premium programmatic and Ad Exchange demand.

Website Security
Your website or app must be served entirely over HTTPS. Secure delivery is now a baseline requirement for video ad requests across Google Ad Manager and third-party exchanges. Mixed or insecure (HTTP) environments can lead to blocked ad calls, lower fill rates, and lost revenue opportunities.

Video Player & Google IMA SDK
To serve video ads effectively, your video player should be integrated with the Google Interactive Media Ads (IMA) SDK. If you are not using an IMA-compliant player, you must manually pass required macros (such as page URL and correlators) in your video ad tags. However, Google strongly recommends using an IMA-enabled player for optimal performance and compatibility.

Ad Exchange Integration
If you plan to monetize video inventory through Google Ad Exchange or enable exchange bidding for video, IMA SDK integration is mandatory. The SDK handles ad requests, VAST parsing, creative selection, and measurement across devices.

Meeting these prerequisites ensures access to the widest pool of video demand while minimizing delivery errors and latency. Now you're ready to start configuring video ads within Google Ad Manager. Let's dive in!

How to Get Started with Video Ads in Google Ad Manager?

• Create a video ad unit
• Generate video ad tags
• Create a video line item
• Add creative sets to video line items

While basic features for video advertising are available for Ad Manager, advanced features are available for Google Ad Manager 360 publishers. Also, a few features can only be used by Google Ad Manager 360 Advanced publishers. As we mentioned, contact your account manager to enable it. 

Step 1: Create a Video Ad Unit

This is a quite straightforward process.

• Sign in to your Google Ad Manager account, and go to Inventory > Ad units. Then, click on New ad unit, and select either One level below network or Current level to create an ad unit below a selected ad unit or at the same hierarchy level.
• Enter a code that helps to identify the ad unit in the associated ad tag—for example, mywebsite_sports_home. 
• Then, enter a Name and Description for the ad unit. Select the ad unit size, i.e., Fixed size or Smart banner. (Smart banner is for mobile app inventories).

• Click on the Video (VAST) sizes and enter the master and companion sizes. While master size is mandatory to select, you can skip companion size. Master size is a video ad player’s default resolution (i.e., 640x480v or 400x300v). Here, “v” indicates that the ad unit can play video ad units. Also, companion size is available on the same web page for companion ad slots.

• Select the target window, which defines the browser’s opening of the landing page. Select top if you want to open the landing page in the same window or blank to get it opened in a new window.
• Then go to the Frequency caps. You can set capping value at ad unit and creative (label) levels here.

Step  2: Generate Ad Tags

Video Ad Tags.

• Select the ad units for which you want to generate ad tags. After selecting all the video ad units, click on Generate tags. 
• Select the tag type, for instance, Google Publisher Tags for Video.
• Select the Player SDK type. Select the option from the drop-down menu using Google IMA SDK. In the adapter, you can choose the adapter. If you don’t monetize your Ad Exchange traffic and don’t have an SDK, go with no SDK.
• And then click continue. 
• Configure Tag Parameters:some text
  
  • Description URL
    Enter the URL of the page where the video will be rendered.
  • Companion Sizes
    Add companion sizes if needed.
  • Content Targeting
    Enable content targeting to serve relevant video ads based on the content.
  • Privacy Settings
    Ensure settings like Child-directed and Limit to non-personalized ads to comply with COPPA and other privacy laws.
• At last, you’ll be provided with a Video master tag and a Companion tag* (if the Companion sizes are selected while creating the ad units).

These tags help the server to display linear, non-linear, and companion video ads. Now, share the master video ad tag with your video player, which will help it to retrieve the video ad.

Step 3: Create a Video line item.

To create a line item, you need to define orders first. So, create the orders as explained in this article. After this, follow the below steps to create line items: 

• Enter a name for the line item and select Video VAST.
• Then, select the master size and companion size for the video ads. After this, define the line item priority and type.
• Set the frequency cap. And define the targeting criteria for the line item.

You can use Content, Position, and Request platform targeting for video ads. Since targeting is the factor that decides where and how your video ad content is going to be served, we’ll explain this in detail.

Content Targeting: Through content targeting, publishers can display and target video ads to the video content based on the information collected through metadata or content bundles*. 

Metadata acts as keywords with the help of which publishers can target their video ads to the specific video content. 

In contrast, bundles help publishers group videos into bundles and target the ads to the bundles.

*Note that you need to connect your content source (CMS) to Google Ad Manager and create metadata/bundles for targeting while creating video line items. 

How to Connect Your Video Content to Google Ad Manager?

To access the content ingestion feature, a publisher needs to connect the Ad Manager account with the video content source or content management system. Once this step is done, follow the below steps to define your content source.

• Go to the Video > Content sources > New source.
• Enter the source name and select the content source type. Select MRSS Feed, Ooyala, and Brightcove. If you’re working with Brightcove or Ooyala, enter credentials provided by the player, such as Client ID, Account ID, etc. If you’re working with other players, select MRSS Feed.
• Select the Sync rule, i.e., Automatic or Manual. 

Position Targeting
Position targeting helps publishers target video line items to specific video positions (before, mid, or after video content), determine when the video ads play during a session, for how long it will be played, etc. If you don’t define position targeting, the video ads can be displayed in any position according to the specified ad rules. 

Ad rules

So, if you haven’t created ad rules, follow the steps below to do the same.

• Go to Google Ad Manager and click Video > Ad rules > New ad rule.
• Then, select a name for the ad rule and the type of ad rule, i.e., Standard or Session. Session ad rules are applied to a user’s entire visit to your content and are meant for pre-roll video ads only, while standard rules are applied to a single stream of the content and cover pre-roll, mid-roll, and post-roll video ads. Selecting the ad rule type will open a new section on the same page where you can enter the details for the video ads.
• Go to the Settings section on the same page and select the time for the ad rule to begin and end.
• In the next section, you can select targeting capabilities such as video content, inventory, geography, browsing, user domains, etc.
• At last, select Save.

Now that you have defined ad rules, it’s time to enable these rules for the video ad inventories. To do it, follow the steps given below:

• Go to the Google Ad Manager home page, then Admin > Video > Video setting.
• Then, enable Ad rules. And click Save.

Note: If you cannot see content ingestions and ad rule options in your Ad Manager interface, contact your Google account manager to enable these services.

Request Platform Targeting
This feature enables publishers to target video line items to specific request platforms. With the help of this, you can choose to display video ads in a video player (in-stream video ads) or render them as in-banner video ads (out-stream video ads).

Note: You can also do this [request platform targeting] via “Inventory type” in the new Google Ad Manager UI. 

Step 4: Add creative sets to video line items.

Once you finish line items, you must add creative sets to them. To do that, follow the steps given below:

• Go to Delivery > Line item. Select the video line item you created and want to add a creative set here.
• Click on Add creative sets > New creative set. After this, select the desired advertiser. Then, select Video VAST, and enter the master size. Companion ad size is optional, as we said before. Then, click Continue.
• Now, enter a name for the creative set and select the creative set type as “Redirect, ” a third-party hosted ad creative that can serve linear, non-linear, or overlay ads.
• And, then, Save.

This will expand the creative section where you can enter the details such as VAST tag URL, duration, third-party tracking URLs, etc., provided by the advertiser (or a video player, if you’re selling your impressions via video player bidding or video header bidding). Then, upload the creative in the field.

After saving the details and uploading the creative, you can preview the video line item. Also, you can confirm the association of creative sets with a particular line item by clicking on the tab Associations.

Further, linear video ad creatives can be hosted by Google Ad Manager or done by an external host.

Adding creatives using Google Ad Manager’s new UI:

In the new UI (refer to below), you can select “Redirect” after selecting the advertiser. 

Once you select Redirect, you’ll be taken to a page where you can add VAST Tag URL, video ad sizes, redirect type (video or overlay or both), and add companion ads.

Once you finish the above mentioned steps, you can serve video ads through Google’s ad server. However, there is one more task we didn’t discuss before, i.e., the insertion of video ad tags into a Google IMA SDK-compliant player.

How to Run Video Ads in Google Ad Manager?

To run Video Ads or Video content on the website, Publishers must have enabled a Video Player. Indeed, Integrating video players with Google IMA SDK will be highly beneficial for the publishers, as it supports all types of video templates by IAB. 

How Do Google Ad Manager and Video Player Work Together?

Google IMA SDK is critical for video monetization in Google Ad Manager.

It enables publishers to serve Ad Exchange and programmatic video demand using current industry standards such as VAST and VMAP, while supporting newer interactive frameworks like SIMID. The IMA SDK manages communication between the video player and Ad Manager, ensuring accurate ad selection, delivery, measurement, and reporting across in-stream and out-stream video inventory.

Without IMA SDK integration, publishers may face limited demand access, reduced fill, and incompatibility with advanced video formats increasingly favored by buyers.

The SDK is responsible for interacting with the video player and Ad Manager. So, let’s try to understand how the ad server and video player interact and serve video ads on the page.

1. After the web page gets loaded, the script tag embedded into the video player loads the IMA SDK for the web page. This IMA SDK requests the Ad Manager to return a VAST response* for the specific ad unit.
2. Ad Manager sends the VAST response with its URL to the IMA SDK. Then, the SDK parses the returned VAST response and selects the best media type based on the surrounding. After this, the SDK retrieves the video ad creative.
3. After negotiating the details with the IMA SDK, the video player plays the ad, and then the SDK fires an impression ping.

*Google Ad Manager then passes the requests to Google Ad Exchange or other third-party exchanges (via Open Bidding) to get VAST responses, and then it passes the best VAST response to the SDK (highest paying ad).

Google recommends publishers use their own IMA SDKs, and besides, a few video players, such as Brightcove, Ooyala, etc., are compliant with VAST/VPAID or already have integrated SDKs to the player. So, in such cases, to begin with video advertising, all you need is a valid master video ad tag and a player that has turned on advertising. 

Sidenote: To monetize Google AdX video inventory, Google IMA SDK is mandatory.

Also, read Video Ad Standards by IAB

What’s Next?

Google Ad Manager video ad setup and implementation can get complicated, especially because error rates and page latency could hamper your UX. That being said, it is worth a try. By being here, we can see that you are already taking the right steps to increase the revenue. Many large and mid-sized publishers, including BuzzFeed, Pitchfork, and The New York Times, have already added programmatic video ads to their programmatic ad strategy, increasing the overall yield.