There are so many ways of ‘enhancing’ Google Ads these days that even we have trouble keeping on top of them. 14 Types Of Google Ads Extensions & What They Do on Search Engine Journal is a good introduction, and is worth a scan whether you run your own search advertising or use an agency to do it.
Sitelink extensions are the ones that allow us to run multiple sections for different pages, and create the biggest text ads. But location extensions, callouts and ‘structured snippets’ are also effective, and there are even image opportunities too nowadays. Take a look at the ads showing for your top searches, and see if your competitors are going beyond just a simple title and description.