Difference between the first category of recommendations and the read-alike recommendations
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What is the difference between the first category of recommendations (ie for user name) and the read-alike recommendations category? Also how long does it take to update your recommendations after editing your library?
Here's the help page for the recommendations page:
The sections that might be most helpful are "How does the computer calculate Automatic Recommendations?" and "What are read-alikes?"
Read-alikes depend more on comparing your library to other members who have similar libraries, and then seeing what they have that you don't.
The main recommendations list takes a broader look, taking into account how often people who have book X also have book Y, and also looks at books with similar tags and subject headings to those on your books.
Edited to add: In my experience, the main recommendations list tends to emphasize more popular works, while the read-alike recommendations are narrower and more specific to certain genres or subjects.
I don't know how often they update.
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