How to Choose Pillar Topics That Build Real Topical Authority
Building a content hub is a multi-month investment — a strong pillar with a dozen supporting cluster articles can easily represent 30,000+ words of content and weeks of work. Choosing the wrong pillar topic means that investment doesn't pay off, so the selection process deserves more rigor than "what does our team feel like writing about."
Start from business relevance, not just search volume
A pillar topic should map to something your business genuinely serves — ideally a topic adjacent to your product or service where ranking well would attract people who could realistically become customers. High-volume topics that are only tangentially related to your business can drive traffic that never converts and dilutes your site's overall topical focus in the eyes of search engines, which increasingly reward sites that stay coherent around their core expertise rather than chasing unrelated traffic.
Validate the topic has enough depth for a real cluster
Use a keyword research tool (Ahrefs, Semrush, or even Google's "People also ask" and related searches) to map out how many genuinely distinct sub-topics and questions exist under the candidate pillar. You need at least 8-12 sub-topics with real, distinct search demand to justify a hub structure — if you can only find three related questions, the topic is better served by a single strong article than a full hub, and forcing thin cluster pages just to fill out the structure actively hurts you.
Check competitive reality before committing
Search the pillar keyword and scan the top 10 results: are they dominated by massive, well-established sites with years of accumulated authority (major publishers, category leaders), or is there a realistic path in for a smaller, more focused site? Domain-level authority matters, but topical focus can offset it — a smaller site that's genuinely the most comprehensive, most current resource on a narrower topic frequently outranks a much bigger site that only covers it superficially. Look specifically for gaps: sub-topics the top results cover thinly or not at all are your best early opportunities.
Score candidate topics before choosing
Build a simple scoring matrix across your candidate pillar topics using four factors, each scored 1-5:
- Business relevance: how directly does ranking here bring in the right audience?
- Search demand: combined monthly search volume across the pillar and its likely cluster keywords.
- Competitive feasibility: realistic chance of ranking well within 6-12 months given your site's current authority.
- Content reusability: can you actually produce 10+ genuinely useful, non-redundant articles on this topic, or will you be stretching?
Topics scoring well across all four are your best candidates. A topic with huge search demand but low business relevance, or high relevance but thin available sub-topics, should be deprioritized even if one factor looks tempting in isolation.
Start with one hub, not three
It's tempting to launch multiple hubs simultaneously once you understand the model, but a single well-built, fully interlinked hub with 10-15 strong articles will outperform three half-finished hubs with three articles each. Concentrate resources on proving the model works on your best candidate topic before expanding to a second pillar — and use what you learn about production time and traffic timelines from the first hub to plan the second more accurately. For a deeper look at this, see our guide, Exploiting Low-Competition Niche Topics.
Interview your own sales and support teams first
Before running any keyword tool, ask your sales and customer success teams which two or three topics come up most often in prospect and customer conversations. These internal signals often point toward pillar topics with strong business relevance that a purely keyword-driven process would miss, and they give you a head start on identifying the specific sub-questions a cluster needs to cover, since your team is already fielding those exact questions every week. For a deeper look at this, see our guide, Building Topical Authority With a Content Cluster Strategy.