Interest-Stack Narrowing
Layer multiple must-also-match interests on top of a broad interest so your targeting only reaches people who share several signals at once. This sharpens a vague broad interest into a specific persona without manually building lists.
- 1
Define the audience source: clean the seed list before uploading (CSV or pixel-based for interest-stack narrowing).
- 2
Set up a dedicated conversion event in your ad platform's pixel so you can attribute downstream signups, not just clicks.
- 3
Build the creative-set: 3-5 variants that share the value prop but differ in hook (problem-first, social-proof, demo-led).
- 4
Launch at $X / day with frequency-cap enforced; budget for at least 7 days before reading results.
- 5
Read by ROAS / CPL daily; kill bottom-quartile creatives at the 100-impression mark.
- 6
Scale winners by 20% / day to avoid breaking the learning phase, and refresh creative every 14 days to fight ad fatigue.
A productivity SaaS targets people interested in Notion AND who follow specific PM influencers AND who engage with Lenny's Newsletter — three layered must-also conditions — producing a far tighter PM audience than any single interest.
- CPL (cost per lead)
- CAC
- Signups / day
- Pipeline created
- Audience match rate
Stop stacking once each layer drops audience below about 500k; below that the algorithm cannot optimize and delivery gets erratic.
- ✗Buying volume before the funnel converts — paid traffic into a broken funnel is just a fast way to burn cash.
- ✗Underbudgeting creative production; the platform is now 10% of the work, the creative is 90%.
- ✗Watch-out from the playbook: Stop stacking once each layer drops audience below about 500k; below that the algorithm cannot optimize and delivery gets erratic.
Niche audiences where one broad interest is too generic