Each platform weighs signals differently — TikTok leans on watch time and completion rate, Instagram weighs relationship and interaction history, YouTube optimizes for watch time and satisfaction surveys — but the shared logic is prediction: show people more of what they are likely to engage with.
Creator culture personifies it: the algorithm "likes" consistency, "punishes" deleted posts, "rewards" niching down. Much of this folklore is unverified, but some practical truths hold across platforms: early engagement matters, retention matters most for video, and consistency helps the system learn who your content is for. Posting natively on each platform — rather than reposting watermarked videos — is one of the few cross-platform recommendations the platforms themselves have confirmed.
