The key difference is of course that campaign-level Sitelink applies to the entire campaign and adgroup-level Sitelink applies only to adgroups. If there are Sitelinks on both the campaign and the adgroup, the ones on the adgroup take precedence over the ones on the campaign. Another difference is that at the adgorup level you can set conditions and you can use variables from the feed, so you can prepare variables in the feed that you then dynamically change as part of the sync, the setup with the variables can then look like this:

The setup interface itself is practically the same for both variants, of course with the aforementioned differences in the use of variables and filtering.
1. Choose the advertising system you want to send Sitelinks to.
2. Enter the Sitelink itself using the Title, URL, or First and Second lines of the Sitelink.
3. You can also set up your own UTM Parameters to help measure campaign performance. However, this needs to be enabled in the ad system first.
4. For adgroups, you can set the conditions.
5. And finally, a time limit, which allows you to specify when Sitelink starts and stops.


On the right you can see a preview of Sitelink.

And you're done. Now you know how to set up Sitelinks to increase the chances of success for your ads. And we're keeping our fingers crossed that it works!