I see in the forum config. options.

Banner Ads – Active Forums Enterprise includes the ability to use the built-in DotNetNuke Banner system to display ads within topics.

However I can't find any info on how to set this up.  Looked in the Admin Manual and searched the forum.  How to do please?

I believe you just add the [BANNER] token to the desired template.

Thanks, will give it a try.

Didn't work, chucked an error. Not sure if I did this correctly. From the Topic View Template

What is the error you are getting? Attach your code as a .txt file.