The new Wikipedia app for iOS has an "Explore" feature "designed to make it easier to find random new things to read." The official blog post cites Explore as including the following:
- Featured article of the day
- Top read articles
- Picture of the day
- Random articles
- Nearby articles
- Recommended articles based on what you’ve read
1, 2, and 3 are pretty straightforward.
For #4, over what set is it random? (All articles? Non-stubs? Etc.)
For #5, how does the algorithm determine "nearby?"
For #6, how does it decide what to recommend based on what one has read?