The set of rules and signals a platform (social media, search, or otherwise) uses to determine what content gets shown to which users, and in what order or priority.
Why it matters
Because algorithms directly determine visibility, understanding (or at least tracking) how a given platform's algorithm currently weighs factors like engagement, recency, or relevance is central to any organic content strategy on that platform — and algorithms change frequently, which is why strategies built around them require ongoing adjustment.
In a sentence
"Engagement dropped across the board after the platform's last algorithm update deprioritized external links in the feed."