SSDs don't need to get defragged, but it needs occasional trimming, and that can be done either continuously, or batched. Sadly, there's no fancy graphical application to show you what was trimmed in the batched version.

If you use a filesystem with checksums, you can also scrub it. The stakes are there: is my data bit rotted? Will the errors resist recovery? It also takes about the same time as the defrag, but again I don't know of any graphical tools.