Display Advertising

hi my client has sent me this link asking if i can add it to the code in the site.
https://support.google.com/analytics/answer/2444872?hl=en-GB&utm_id=ad

i am using this plugin and dont really want to go messing with it till i know exactly what im doing.

any suggestions

thanks

https://www.ads-software.com/plugins/google-analytics-for-wordpress/