Every major social platform shows people a ranked feed, not a chronological one. Algorithms decide which posts appear, in what order, and to whom. Platforms change the details often, but the core logic is consistent: show each person what they're most likely to engage with and keep watching. Here's how the main platforms work, and what businesses can do about it.
The common principles
- Interest and relevance: content similar to what a person already engages with.
- Relationship: accounts people interact with often, through likes, comments, DMs and profile visits.
- Engagement quality: comments, shares, saves and watch time count for more than quick likes.
- Recency: newer posts usually get priority.
- Originality: platforms favour original content over reposts and watermarked videos from other apps.
Instagram ranks the feed, Stories, Reels and Explore separately. For Reels, watch time, shares (especially by DM) and replays matter most, and Reels can reach people who don't follow you. Stories are mostly seen by people who interact with you regularly. Practical takeaways: hook viewers in the first seconds, make content worth sharing, and post Stories consistently. See our Instagram Reels tips and Instagram Story features guide.
LinkedIn tests posts with a small group first, then widens distribution if people engage meaningfully. Thoughtful comments and "dwell time" (how long people spend reading) carry weight, and LinkedIn tends to favour expertise and knowledge over viral bait. Posts from people usually outperform company pages. Our LinkedIn personal branding playbook covers what to post.
Facebook mixes content from friends, groups and pages with recommended posts and Reels from accounts people don't follow. Meaningful interactions such as comments and shares, and content that sparks conversation in groups, tend to travel further. Short video is increasingly important.
YouTube
YouTube recommends videos based on what each viewer is likely to watch and be satisfied with. Click-through rate on thumbnails, watch time and viewer satisfaction signals all matter. YouTube is also a search engine, so titles and descriptions that match searches help. Read our YouTube SEO guide.
What businesses should do
- Post for a specific audience. Broad content gets weak signals from everyone.
- Lead with video on Instagram, Facebook and YouTube; lead with clear, useful text and carousels on LinkedIn.
- Earn comments and shares. Ask real questions, share opinions and useful frameworks.
- Reply quickly. Early conversation helps distribution.
- Be consistent. Regular posting builds the relationship signals that keep you in feeds.
- Repurpose, don't repost. Adapt content for each platform rather than copying it across. See our guide to content distribution.
- Combine organic and paid. Boost posts that already perform well, and use creators to reach new audiences.
Common myths
- "Hashtags drive reach." They help categorise content but matter far less than they used to.
- "There's a perfect posting time." Timing matters a little; content quality matters a lot more.
- "Links kill reach." Some platforms show posts with external links less, but useful content with a link still works. Test it.
FAQs
How often do algorithms change?
Constantly, in small ways. The core principle, showing people what they'll engage with, stays the same.
Should we post every day?
Only if you can keep quality high. Fewer, better posts usually beat daily filler.
Do paid ads affect organic reach?
Not directly, but ads can grow your audience and engagement, which supports organic reach over time.
Want social media that works with the algorithms? Our social media marketing agency plans, creates and manages content for every major platform. See typical social media marketing costs, or get a free audit.