Defraggler Optimize Drive - what does it do to your SSD?

I've read quite a few threads on here that just turned into pithy arguments by people with single digit posts, so going to re-ask the question, hoping to keep it clean and maybe actually settle on an answer.

We all know you shouldn't defrag a SSD, so what does the Optimize or Quick Optimize Drive options do exactly? I think we're all assuming one does a TRIM, but has anyone figured out or heard from development for sure?

See #5 on the Defraggler docs page here for the official response of using it on an SSD:

https://www.piriform.com/docs/defraggler

Thanks. Too bad their response is lacking, and doesn't address the specific options.