Open Measurement

Implement the IAB Open Measurement SDK to support third-party viewability and verification for in-app ads.

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Last updated 2 days ago

Unity supports Open Measurement (OM) third-party verification code with your video ad. For more information, refer to the the IAB's OM spec.

VAST tag

To implement OM code in your VAST tag, complete the following steps:

Include the
```
<AdVerifications>
```
node. For more information, refer to section 3.16 of the VAST guidelines.

Note

If you are using VAST 2.X or 3.X, include

<AdVerifications>

as an

<Extension>

under

<Extensions>

Include your vendor key (to identify whether you have extra parameters that need to be sent to your verification script) inside the
```
<Verification>
```
tag.
Include the verification script inside the
```
<JavaScriptResource>
```
tag.


<AdVerifications>	<Verification vendor="company.com-omid">		<JavaScriptResource apiFramework="omid" browserOptional="true">			<![CDATA[https://verification.com/omid_verification.js]]>		</JavaScriptResource>		<VerificationParameters>			<![CDATA[verification params key/value pairs]]>		</VerificationParameters>	</Verifications></AdVerifications>

Note

Verification parameters are optional.

JavaScript resource

Include a verification script in the

<JavaScriptResource>

tag that immediately registers session observers, video events, and ad events to simplify event management and ensure that all events are called in order.

Note

When registering the session observer, always include a vendor key that matches the

vendor='key'

attribute in the

<Verifications>

node.

The following list details the macros that Unity supports if they are provided in the tracking URL:

```
%OM_ENABLED%
```
- Defaults to
```
false
```
  .
- If VAST supports OM, set to
```
true
```
  .
```
%OM_VENDORS%
```
- An identifier for the OM SDK integration.
- This is the same as the
```
name
```
  and
```
versionString
```
  parameters of the
```
OMIDPartner
```
  object.

Example of a simple verification script

OMID troubleshooting

If an error occurs, a tracking pixel's

[REASON]

macro might return one of the following reasons:

```
VERIFICATION_RESOURCE_REJECTED
```
```
VERIFICATION_NOT_SUPPORTED
```
```
ERROR_RESOURCE_LOADING
```

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Open Measurement

VAST tag

JavaScript resource

OMID troubleshooting