
Social media engagement didn't die but it went somewhere you can't see
Many marketers seem to be panicking about engagement on social being down. These are the numbers: Instagram engagement rates are down from 2.5-3% in 2020 to 0.5-0.9% by 2025, based on a benchmark report covering 35 million posts. Comments on TikTok fell 24% year-over-year. Instagram comments dropped 16%. The overall engagement across platforms fell roughly 24% in 2025 alone.
Quite often, brands look at those numbers and conclude that social media stopped working.
But that's not correct, because even if public engagement cratered, private engagement like shares, saves and DMs went the other direction. TikTok shares grew 45% year-over-year. Instagram shares grew 12%. DMs are climbing across every platform. People are saving posts instead of liking them and forwarding content to three people who actually matter instead of broadcasting a reaction to their entire follower list. Just cross checked with my teenager: they do the share posts with friends whíthout necessarily having liked it. A generation thing?
In anycase: One thing is clear: engagement didn't disappear but simply went underground.
There's a name for this: dark social. Content shared through DMs, WhatsApp, private group chats, email forwards. The downside for marketers: This is not trackable referral data and totally invisible to standard analytics, besides its where most meaningful engagement actually happens.
Why did this shift happen?
When Instagram made likes public and permanent, engaging became a social statement. Pressing like on a brand post is a broadcast to your whole network. A lot of people stopped likig and started DM-ing instead. The behavior is the same, it just moved private.
What the private numbers look like:
- Instagram DMs: 90% open rates vs ~20% for email
- DM reply rates: 60% vs 1–5% click-through for email
- DM-to-sale conversion: 7–20% for targeted campaigns
- Responding to a DM within one minute: 391% increase in conversion
- 20% of all business Stories generate at least one direct message
These should not be titles "engagement metrics" as those are actually sales metrics.
What to track instead:
Saves and shares are today stronger intent signals than likes. Carousels consistently drive the most saves right now. DMs should be treated as a sales channel, with actual response systems, not an afterthought. And post-purchase surveys asking "how did you hear about us?" regularly surface word-of-mouth and social sharing that analytics platforms never capture.
The brands figuring this out are building content specifically designed to be forwarded. The question they ask before publishing: will someone send this to a friend?
Useful checklists, counter-intuitive benchmarks, frameworks, "mistakes to avoid" lists, comparison tables. That's the format that travels privately.
What's your experience been? Are you seeing the same shift in your own analytics or is public engagement still holding in certain formats or niches?