Disqus comments allows Disqus users to comment DJ-Catalog2 items.
To enable DJ-Catalog2 Disqus comments open Components -> DJ-Catalog2 ->Options
Choose General settings tab and go to "Social sharing & commenting"
Short description:
Comments - Select comments type in advert view
Disqus shortname - enter your Disqus website's shortname
Let's see the example DJ-Catalog2 product with enabled Disqus plugin: