Google, Facebook, TikTok and others are starting to talk more about how their algorithms work in a bid to win trust.

Yes, but: It’s hard to know what isn’t being revealed.

• Google on Monday published a blog post that shows users how to access more information about their search results, the day ahead of its Q4 earnings report.
• Facebook similarly released a post last week about how its News Feed algorithm works the day before its Q4 earnings.
• TikTok last year, amid the threat of a ban from the Trump administration, walked Axios and other reporters through an extensive presentation of how its prized algorithm works.

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