Dubit found that age 12 is the year social features unlock. Our February 2026 study of the five big social platforms measured each single year of age from 10 to 12. It asked about 204 to 210 young people at each age. On several of those platforms the jump from 11 to 12 is sharper than the jump from 10 to 11. Snapchat direct messages rise from 18.6% of 11 year olds to 25.7% of 12 year olds.
YouTube commenting climbs in steady steps. It runs at 18.1% of 10 year olds, 20.1% of 11 year olds and 21.9% of 12 year olds. YouTube likes run at 28.4% of 10 year olds and 28.9% of 11 year olds, then jump to 38.6% at 12. Instagram commenting falls from 12.3% of 10 year olds to 9.3% of 11 year olds, then climbs to 17.6% at 12. TikTok commenting rises from 18.6% of 11 year olds to 26.2% of 12 year olds.
Messaging is the behaviour that accelerates after 12. Snapchat messaging rises from 49.0% of 10 to 12 year olds to 62.1% of 13 to 15 year olds. Content creation goes the other way across the same age bands, falling on TikTok from 27.6% to 25.8% and on YouTube from 14.3% to 12.9%.
How many platforms a young person is on predicts direct messaging. Among the 8 to 12 year olds our youth research team surveyed, it is the strongest predictor of direct-message use we found. Those on three or more use direct messages at 57.8%, against 3.3% of those on one.
TikTok takes the favourite-platform lead at 10 to 12. Among 6 to 9 year olds, YouTube leads on 30.8% against TikTok's 18.9%. Among 10 to 12 year olds, TikTok leads for the first time, on 25.5% against YouTube's 21.2%.
The older they get, the more TikTok is where their friends are. Friend-following on TikTok rises from 31.3% of 5 to 7 year olds to 53.4% of 14 to 15 year olds. On YouTube it grows more slowly over the same ages, from 13.5% to 28.9%. Our study reads that as TikTok becoming a social network and YouTube a content library.
