Explore
Explore lists the topics people published, in rows: Just published, From your friends, and one row per category. Each row shows its newest topics. See all shows a whole row, with a search of its own. The search at the top, or /, finds published topics by name or category. Both show the first topics they find; Show more at the bottom shows the next ones.
Each topic shows whose it is (or “Yours” for your own), and how many cards and subtopics it holds.
Study it
Open someone else’s topic and you see whose it is at the top: “Published by” or “Shared by”, with View profile. From there it works like your own topics: Study it and flag cards. Your progress, flags and pins are your own, and nobody else sees them.
Its sources are its owner’s alone. You see its cards, with their images, but there’s no Sources tab, and the cards don’t show which sources they come from.
To study it every day, pin it. A pinned topic comes up on Today and in your day’s session like your own topics. You can also add it to an exam. See Pin topics.
What you can’t do
You can’t change someone else’s cards or subtopics, or see their sources. If something’s wrong, let its owner know.
If its owner stops sharing it, unpublishes it, archives it or moves it to the trash, you can’t open it anymore. Your pin and your progress stay, and count again if it comes back.