Add key-values to a VAST tag URL

Key-value pairs allow you to set specific targeting, such as demographics, certain positions on a webpage, or a particular page or pages on a given topic.

You can target key-values when you generate ad tags in Ad Manager, or manually by using the keyword cust_params.

To add key-values to your video ad tag:

1. Identify the key-value pairs you want to use in your ad tag. When a key has multiple values, use a comma (,) to separate the values. In this example, we use the key-value pairs section=blog and anotherKey=value1,value2.

2. Combine all key-value pairs with an ampersand (&).

   section=blog&anotherKey=value1,value2

3. Encode the following characters:
    

   Character	Encoded value
   =	%3D
   &	%26
   ,	%2C

    

   section=blog&anotherKey=value1,value2

    becomes

   section%3Dblog%26anotherKey%3Dvalue1%2Cvalue2

4. Set the value as the cust_params keyword.

   cust_params=section%3Dblog%26anotherKey%3Dvalue1%2Cvalue2

5. Add the "&" character to the beginning and end to separate it from the other targeting information in the tag.

   &cust_params=section%3Dblog%26anotherKey%3Dvalue1%2Cvalue2&

6. Add the value to the original master video tag.

    _{Original tag}

   https://securepubads.g.doubleclick.net/gampad/ads?
sz=400x300&
gdfp_req=1&
iu=/6062/videodemo&
ciu_szs=728x90,300x250&
url=https://simplevideoad.com&
correlator=7104&
env=vp&
unviewed_position_start=1&
output=xml_vast2

    _{New tag with key-values}

   https://securepubads.g.doubleclick.net/gampad/ads?
sz=400x300&
gdfp_req=1&
iu=/6062/videodemo&
ciu_szs=728x90,300x250&
url=https://simplevideoad.com&
correlator=7104&
env=vp&
unviewed_position_start=1&
output=xml_vast2&
cust_params=section%3Dblog%26anotherKey%3Dvalue1%2Cvalue2