Reel Spy Work: Infiltrating the algorithm with Instagram Reels

What Is Instagram Reels: A Clear Definition

Instagram Reels is a short-form video feature within Instagram that lets users create and share vertical video clips up to 90 seconds long, discoverable by both followers and non-followers through a dedicated Explore-style feed. Reels functions as Instagram’s primary answer to TikTok, combining audio, effects, and creative tools into a single format. Businesses and creators use Reels to reach new audiences beyond their existing follower base, making it one of the most impactful formats for organic growth on the platform.

Instagram Reels is not a standalone app — it lives inside the main Instagram application and is governed by its own dedicated algorithm, separate from the standard feed ranking system.

How the Instagram Reels Algorithm Works

The Instagram Reels algorithm prioritises video content based on predicted viewer interaction. Understanding its three core ranking signals helps creators produce content that reaches more people.

Signal 1: Who Created the Content

The algorithm evaluates the relationship between viewer and creator. If a user regularly comments, likes, or shares content from a specific account, that account’s Reels are more likely to appear in their feed. Consistent engagement with a creator acts as a positive signal.

Signal 2: What Type of Content It Is

Instagram Reels uses interest-based categorisation to match content with viewers. If a user’s feed activity centres on travel, fitness, or food, the algorithm surfaces Reels aligned with those topics — regardless of whether the viewer follows the creator.

Signal 3: When the Content Was Posted

Recency and posting frequency both matter. The algorithm factors in how recently a Reel was published alongside how often a viewer scrolls through their feed, calibrating what to show based on individual browsing habits.

Why Content Quality and Originality Matter

Instagram actively deprioritises recycled or low-quality content in the Reels feed. This policy specifically targets content exported from competing platforms such as TikTok that carries visible third-party watermarks. Original, high-resolution video is given preference in distribution.

How to Create Instagram Reels the Algorithm Will Favour

Instagram Reels content that performs well shares common production and creative characteristics. According to Instagram’s own creator guidance, Reels that gain the widest distribution are those that:

• Are entertaining, fun, and attention-grabbing from the first second
• Are inspiring and potentially trend-setting within their niche
• Utilise a range of creative tools including filters, text overlays, and camera effects
• Use vertical video format (9:16 aspect ratio is ideal)
• Use music sourced from the Instagram Reels audio library
• Are original, experimental, and not repurposed from other platforms

All Reels must also comply with Instagram’s community guidelines. Videos that violate these standards are removed from distribution regardless of their engagement signals.

Instagram Reels Engagement Results

The business case for prioritising Reels is supported by documented outcomes. According to Later’s engagement research, their engagement rate increased by over 500% after integrating Reels into their content strategy. This result reflects the broader reach advantage Reels hold over standard feed posts, which are largely limited to existing followers.

Instagram Reels reaches audiences that standard feed posts do not — the Reels feed surfaces content from accounts a viewer does not follow, making it a primary discovery channel for brand and creator growth.

To make the most of this reach advantage, Reels content should be produced natively, optimised for vertical viewing, and published with consistency. Learn more about how Bark’s innovative data-driven approach can help you execute your influencer marketing strategy.

Frequently Asked Questions About Instagram Reels

What is the difference between Instagram Reels and Instagram Stories?

Instagram Reels are permanent short-form video posts that appear in a dedicated feed and can be discovered by users who do not follow the creator. Stories disappear after 24 hours and are visible primarily to existing followers. Reels are designed for reach and discovery; Stories are designed for real-time updates to an existing audience.

Does the Instagram Reels algorithm favour accounts with more followers?

Follower count is not a primary ranking signal for Reels. The algorithm prioritises predicted engagement based on viewer interests and past behaviour, meaning smaller accounts can achieve wide reach if their content matches viewer interests strongly.

Why does Instagram deprioritise Reels with TikTok watermarks?

Instagram and TikTok are direct competitors in the short-form video market. Instagram’s algorithm treats watermarked content from TikTok as low-quality or recycled, reducing its distribution in the Reels feed. Creators should produce native content within Instagram to avoid this penalty.

What video format should Instagram Reels use?

Instagram recommends vertical video at a 9:16 aspect ratio for Reels. This format fills the full screen on mobile devices and aligns with how the majority of Instagram users hold their phones when viewing content.

How often should creators post Instagram Reels to benefit from the algorithm?

Posting frequency is one of the timing signals the algorithm uses, but consistency matters more than volume. Publishing Reels at regular intervals when your audience is most active signals reliability to the algorithm and builds the engagement history it uses to determine future distribution.