The 3–5 core themes or topic categories every piece of content for an account maps to — the editorial spine of a content strategy.
Content pillars are the small set of recurring themes an account covers. A real-estate investor account might have pillars: deal breakdowns, market updates, mindset, behind-the-scenes. Every piece of content fits under one of those pillars; nothing goes off-pillar.
The point is positioning. An audience follows for a specific reason — they want more of that thing. Pillars prevent topic drift (the slow slide into posting random life updates that nobody followed for) and make content planning concrete. "I owe my audience 2 deal-breakdown posts and 1 mindset post this week" is operational; "I need to post 3 times this week" is not.
Most accounts settle on 3–5 pillars. Fewer than 3 feels repetitive; more than 5 dilutes positioning. Kompozy's topic-pool feature lets users define pillars as named pools that the engine rotates through when generating content.