In summary, for shorter content with articles themed around the site topic, single-page provides a good user experience and SEO - otherwise go multi-page. We reference site builders for either case, both content-oriented and visual.
In general, in order to check which pages of a site are indexed, do a Google site search. For instance, if the site URL is example.com, then google
site:example.com. In this way, you may check example sites of Wix (Oct. 2016) and Weebly (Sep. 2016), respectively.
Websitebuilderexpert.com top site builder picks:
"It's marketing, stupid" (according to Bill Clinton)
It's partly comparing apples with pears, but the two presentation tools other than SlideShare are listed as "Alternatives to SlideShare". Another candidate on the innovative side would be slides.com, but it's difficult to get Google trends for this very much generic brand name.
The trend for slides.com shows: versatility and openness pays. As a percentage, the trend is even stronger then Google Slides'.