Buffer analyzed over a million Facebook posts and found that posts where creators replied to comments received approximately 9.5% more comments than those without replies. The effect is statistically significant but smaller than on other platforms. Here's what the data shows and what it means for your posting strategy.
Quick take
- Posts with creator replies averaged 9.5% more comments than those without
- The study analyzed 1 million+ posts across 97,427 Facebook profiles
- 53.8% of pages performed better when replying versus not replying
- LinkedIn showed a larger effect (83% of pages improved), while Threads showed 42%
- Raw median data initially showed the opposite trend, highlighting why methodology matters
How the study worked
Buffer's data scientist used a fixed effects regression model rather than comparing page-to-page performance. This approach holds constant factors like audience size, niche, and posting frequency, isolating the effect of replying within each account's own behavior over time.
The methodology asked: does this specific page perform better when it replies versus when it doesn't? This controls for the many variables that differ between accounts.
A Z-score analysis served as a secondary validation, measuring how each post performed relative to that account's normal baseline. Both methods converged on the same directional finding.
Our analysis
The 9.5% figure is modest compared to LinkedIn (30% on the platform) or Threads (42%), but Facebook's mature, broad ecosystem makes incremental gains more meaningful. A consistent single-digit improvement across a million posts is nothing to dismiss.
The median data initially suggested the opposite—posts without replies had slightly higher median comment counts (22 vs 16). This seeming contradiction disappears when you understand the methodology. Raw medians mix together accounts of different sizes and niches, creating a misleading comparison. The fixed effects model corrects for this by serving as its own control.
It's worth noting the study measures reactions specifically, not total engagement, to avoid circular logic (counting comments within a metric that tests comment impact).
What it means for you
If you're already replying to comments on Facebook, keep doing it. The 9.5% lift is real. If you're not replying, even sporadic engagement with top commenters likely provides some benefit without requiring you to respond to every comment.
The effect size suggests replying matters more on LinkedIn and Threads, where the cultural norms around creator engagement are stronger. On Facebook, it's a useful lever but not a transformative strategy on its own.
Bottom line
Replying to Facebook comments provides a measurable but modest boost. It's worth doing, but it's not a substitute for strong content, good timing, or platform-specific strategy.
Key takeaways
- Creator replies on Facebook correlate with roughly 9.5% more comments
- Fixed-effects methodology controls for account-level differences
- The effect is smaller on Facebook than LinkedIn or Threads
- Raw median data can mislead—methodology matters for interpreting engagement studies
Frequently asked questions
How many posts were analyzed in the study?
Approximately one million posts across 97,427 Facebook profiles were included in the analysis.
What methodology did Buffer use?
A fixed effects regression model that compares each account's performance when replying versus not replying, holding constant audience size, niche, and other account-level factors.
Is the 9.5% increase statistically significant?
Yes. The effect met standard statistical significance thresholds and was corroborated by Z-score analysis.
Does replying to comments help on other platforms?
Yes. Similar patterns were found across six platforms analyzed, with increases ranging from 5% to 42%, with LinkedIn showing the strongest effect at 83%.