Instagram Reels Algorithm Explained: Key Signals for 2026

Instagram Reels Algorithm Key Signals for 2026

The Instagram Reels algorithm prioritizes entertaining, short-form videos using AI to predict viewer engagement, drawing from signals like watch time, interactions, recency, and user preferences, while emphasizing discovery from non-followed accounts.

Core Ranking Signals

Instagram evaluates Reels based on these primary factors to score and order content in feeds, Explore, and the dedicated Reels tab:

• Watch time and completion rate: Prioritizes videos watched fully or rewatched; shorter Reels (under 90 seconds) perform better as viewers are more likely to finish them.
• Interactions: Likes, comments, shares, saves, and quick engagement speed boost visibility; reshares and follow-up actions (e.g., following the creator) are strong signals.
• Recency: Newer Reels appear first to keep feeds fresh.
• Sound popularity and trends: Uses trending audio tracks and participation in viral challenges to increase reach; remixing popular Reels helps.
• User activity and history: Considers past likes, views, and shares on similar content, plus interactions with the creator.
• Content diversity and preferences: Introduces varied creators, matching user interests and similar users' behaviors; favors Reels over other formats for entertainment.
• Relationship signals: Stronger from accounts users engage with frequently.
• Safety and guidelines: Demotes or removes violating content.

New 2026 Feature: "Your Algorithm"

Launched in December 2025 and rolled out globally to English-speaking users, this tool lets users customize Reels feeds by reviewing, adding, or down-ranking topics (e.g., via profile > menu > Content Preferences > Your Algorithm). Users can select top interests for 2026, making content alignment with chosen topics essential for creators—mismatched Reels surface less.

Creator Tips Aligned to Signals

• Hook viewers in the first 3 seconds.
• Post short Reels with trending sounds; collaborate via Stories or profiles for cross-promotion.
• Match audience-selected topics via "Your Algorithm" for better surfacing.
• Use Instagram's creative tools (effects, audio) as Reels get preferential push.

These signals apply across separate algorithms for Feed, Explore, Stories, and Reels, with Reels focusing on entertainment and discovery. Instagram head Adam Mosseri notes separate systems per surface prevent one format dominating.