When I use it on our landingpage it simply extracts one sentence from the page:

Use state-of-the-art pseudonymization and anonymization methods to secure your data in real-time.

I think it's a good summary of what we do, but I wouldn't call this summarization as I would think that implies synthesizing new content from the existing one, it's more a highlighting service I'd say. For other pages it doesnt' works so well, so maybe I just got lucky.