How each platform's algorithm actually works (right now)

Facebook prioritizes reels and native video over images and link posts. Keep posts short (40-80 chars), put links in the first comment, and write for shares.

Facebook's feed in 2025 is mostly driven by reels + native video:
- Reels and native video dramatically outperform image posts and link posts.
- Posts with external links in the body lose ~50% reach. Put the link in the first comment.
- Sweet spot post length is short: 40-80 chars. Anything past ~480 chars is truncated…

Instagram weights saves and shares above likes and comments. Reels reach further than carousels, which reach further than single posts. Short captions with a strong first line outperform long ones.

Instagram's public algorithm framework (Mosseri 2024-2025):
- Saves are the strongest signal of "valuable content." Optimize captions to drive saves: lists, how-tos, before/after.
- Shares (DMs and shares to story) are second strongest. End on a shareable line.
- Reels get the largest reach lift; carousels beat single …

LinkedIn's feed is driven by comments in the first 60 minutes and dwell time. Always put links in the first comment, never in the post body. Native video and PDF carousels reach further than text-only.

LinkedIn's feed runs on first-hour comment volume + dwell time:
- Comments inside the first 60 minutes drive feed exposure. Posts that get 3+ first-hour comments routinely 5-10x their reach.
- Native video > carousel (PDF) > image post > text-only > article. Articles get ~30% less feed reach than equivalent post text.
…

Threads rewards reply-driving content within the first 45 minutes. Always attach an image — text-only posts reach about 40% less. Aim for 100-280 chars; longer posts lose reach.

Threads ranks on reply volume + reposts:
- Replies are the #1 lever. Posts with 3+ replies in the first 45 minutes routinely 3-5x their reach.
- Image-attached posts reach ~40% further than text-only. Always include an image when possible.
- 100-280 char range is the sweet spot. The full 500-char limit exists but the a…

X (Twitter) rewards posts that get replies fast. Threads beat single posts. Skip URLs in the body. Keep hashtags to 0-1.

X rewards content that triggers replies in the first 30 minutes. The 2024 algorithm leak confirmed:
- Replies count 27x more than a like for ranking inside the home timeline.
- Posts with URLs in the body lose ~40% reach. Put URLs in the first reply.
- Threads (3+ tweets) get a measurable reach lift — break long-form i…