social media.ranking stops being the default: and so does your baseline.

On 8 September 2026 the Australian government confirmed it will require platforms to offer the chronological feed as the default option, with fines of up to 109.2 million Australian dollars. It is the first case where the law, not the user, decides whether what people see goes through ranking.

California signed two pieces that should be read together. AB 1709, signed on 10 September, bans the algorithmic feed for under-16s. The Digital Age Assurance Act moves age verification onto the device from 1 January 2027: age stops being something the user declares inside each app.

And on 17 September the European Commission adopted the Kids Act: it keeps under-13s out, sets 15 as the age for holding an account of one's own and removes profile-based ads for minors. It is not an isolated case: the map Sprout Social published on 10 September counted minimum ages in force in four countries and proposed in seven more.

Ranking is what takes a post to people who don't follow the account. Without it, the feed shows what the accounts you already follow posted, in order of arrival. Distribution to non-followers doesn't shrink: it disappears from the feed and is left to whatever discovery surfaces the rule doesn't touch.

How much that share weighs depends on the account, but it is rarely small. A Sprout Social analysis from 17 September 2026 found that in six out of ten cases more than 70% of views come from accounts that don't follow the poster. It comes from a social media tools vendor and should be read as such, but the direction matches what any insights panel already shows.

Meta's defence points the same way. Adam Mosseri argued on 10 September that without ranking the feed goes to the accounts that post the most, and that switching the algorithm off cuts engagement by up to half. It is the platform defending its product, but it describes the rule change well: where chronological order rules, frequency wins and relevance loses.

For a brand that doesn't talk to teenagers, the temptation is to read all this as someone else's issue. It isn't, for two reasons. Almost every account's audience has a young share, and that is the share whose rules change first. And on-device age verification changes which age the system knows, which moves the audience paid media can reach.

The concrete effect shows up in measurement. The same content, at the same quality, will reach fewer people in a market where the chronological feed is the default, and a campaign with the same exclusions will find a smaller universe where profile-based ads can't touch minors. If the report compares that year with the previous one without saying so, the drop reads as a content or management problem.

Hence the working rule: announce the baseline change before it shows up in the numbers. Not as a pre-emptive excuse, but as part of the context a report has to give for a number to mean anything.

If frequency wins in a chronological feed, the obvious reaction is to post more. It is premature: none of these rules changes how the feed works today in a market where it hasn't been passed, and raising volume before the rule changes only lowers the average quality that today's ranking does reward.

What can be done now is cheap: split reach to followers from reach to non-followers in the report, know what share of the audience sits in the age brackets the rules touch, and keep a dated list of countries. The volume decision is taken when the rule reaches the market, with that data in hand.

The note explains the problem; the services explain the work.