# How to give your best audience its own Facebook ad set URL: https://blackbox.plus/guides/new-ad-set-from-best-audience Level 4: Run it as an ad (https://blackbox.plus/guides/run-ads) Updated: 2026-11-02 Time: about 4 minutes You'll end with: A new ad set for your best age and gender group, live in the same Meta campaign, paid by the losers Do it in Blackbox: https://blackbox.plus/app/plan > Split the age and gender group with the cheapest results into its own ad set, paid for by the ad sets that lose, without overlapping the old one. ## Short answer To give your best audience its own ad set in Blackbox (blackbox.plus), open Plan and click the campaign’s Check-in on the calendar. When one age and gender group inside an ad set gets results clearly cheaper, the check-in lists a move such as New ad set: Men 25–44. Under it, a table compares the group with its ad set: cost per result, results and spend over the run so far, read from Meta by age and gender. The move also says where its money comes from, the losing ad sets that other moves pause or cut, which three to five ads it runs, and who the old ad set keeps, so the two never compete. Click Change something to rename it or lower its budget, down to its minimum of the target cost × 50 ÷ 7 a day. Click Approve: Blackbox makes the ad set in the same Meta campaign and leaves the group out of the old one. It never happens automatically. ## You'll need - **A campaign with ad sets, running on Meta.** Named ad sets, started at least a week ago, with a target cost per result. (Guide: https://blackbox.plus/guides/facebook-ad-sets) - **A check-in to read.** The day-7 or halfway check-in, with its moves card. (Guide: https://blackbox.plus/guides/read-ad-set-test) ## How to give your best audience its own Facebook ad set in Blackbox 1. **Open the check-in.** In **Plan**, click the campaign’s **Check-in · day 7** on the calendar. You'll see: Its card beside the calendar, with the moves under **If you approve**. Starts at: https://blackbox.plus/app/plan ![The calendar’s day with the campaign’s Check-in, day 7, Get leads, 3 moves to approve, ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/01-calendar.png) 2. **Find the new ad set.** Under **If you approve**, find the move that starts **New ad set:**. You'll see: A move such as **New ad set: Men 25–44, with $215 a day**, ticked. ![The move New ad set: Men 25–44, with 215 dollars a day, ticked under If you approve, its title ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/02-move.png) 3. **Read the evidence.** Read the table under the move, then **Its money**, **Its ads** and who the old ad set keeps. You'll see: The group’s cost per lead beside its ad set’s, and the ad sets whose money pays for it. ![The table under the move: men 25–44 at 12.01 dollars a lead against 18.90 for Coffee lovers as a whole, then its money, its ads and who the old ad set keeps, ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/03-evidence.png) 4. **Change its name or budget.** Click **Change something**, then type in **Name** or **Budget a day**. You'll see: The move’s title with the new name and budget, between its floor and its most. ![Change something open: the new ad set renamed Men 25–44, coffee lovers and its budget typed as 200 dollars a day, the fields ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/04-edit.png) 5. **Check the shares.** Read **Shares after approve** under the moves. You'll see: The new ad set as its own slice, marked **(new)**, and the paused ad set marked **paused**. ![Shares after approve: the new ad set as its own slice at 200 dollars a day, New York City paused, ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/05-shares.png) 6. **Approve the moves.** Click **Approve**. You'll see: **What changed**, a tick on the new ad set, and **Done on Meta.** ![What changed: a tick on the new ad set and Done on Meta under the moves, ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/06-done.png) 7. **See it with the others.** Click **Campaign** at the top of Plan. You'll see: The new ad set’s row marked **New**, with the ad set it came from under its name. Starts at: https://blackbox.plus/app/plan ![Plan’s Campaign tab: the ad set by creative grid with the new ad set’s row marked New, from Coffee lovers, ringed](https://blackbox.plus/guides/new-ad-set-from-best-audience/07-campaign.png) ## Good to know - A group is offered only on enough numbers: at least 10 results (its ad set at least 15), a cost per result at least 25% under its ad set’s, or for sales a ROAS a third higher, and between 15% and 75% of its ad set’s spend. - Only a group Meta can leave out of the old ad set is offered: one gender across all its ages, or its youngest or oldest ages. Meta reports ages in fixed groups (18–24, 25–34 and so on), so a group is made of whole ones. A group that wins but can’t be split is named under Left as they are. - The money comes only from the losing ad sets that the other moves pause or cut, at least the floor (target × 50 ÷ 7 a day, rule 4) and up to one and a half times it. When the losers free less than the floor, no new ad set is offered and the card says why. - Ticking the new ad set ticks the moves that pay for it; unticking one of those unticks the new ad set too. - Retargeting grows only from retargeting money, and a new-people ad set that also reaches people who know you is never split (rule 3). - No group is offered when another ad set already reaches it, or when it is already its own ad set (rule 5). The new ad set runs three to five of the old ad set’s best ads, the ones it already proved. - At most two new ad sets come from one check-in; the others wait for the next. - A new ad set is never made automatically. With Move automatically on, the card waits for your Approve, and the moves that pay for it wait with it. - Only Meta ad sets are read by age and gender for now. TikTok, Snapchat, Google and LinkedIn ad sets aren’t, so no new ad set is offered there. Regions aren’t read either: Meta no longer reports website leads and sales by region. - Afterwards the new ad set is part of the campaign: the next check-ins read it and move its money like the others. To read the whole test, see [How to read your ad set test and act on the check-in](https://blackbox.plus/guides/read-ad-set-test). ## Questions people ask **Is this the same as narrowing my Facebook audience?** Partly. The new ad set targets only the winning age and gender group, and the old ad set leaves that group out, so it narrows too. Nothing else in either audience changes, and the two never compete for the same people. **Why Men 25–44 and not men 30 to 40?** Meta reports results in fixed age groups, 18–24, 25–34, 35–44 and so on. The new ad set is made of whole groups, so its ages are those groups’ edges. **A group does better but there is no new ad set** Look under Left as they are: the card says why. Meta can’t leave that group out of the old ad set, another ad set already reaches it, or the losing ad sets don’t free its minimum yet. **Why does it wait for me when moves are automatic?** A new ad set changes who your campaign reaches, not only where the money goes. That stays your call, so the card waits for Approve. **Can I give the new ad set more money?** Not on the card: it takes at most what the moves give it, so the campaign never spends more than before. Later check-ins move more to it when it keeps winning. **How do I undo it?** Open its steps in Inbox and click Undo: the new ad set is deleted and the old ad set gets its ages and gender back.