Topical authority
Topical authority is the depth and breadth of trust a search engine assigns your site on a specific subject, based on how thoroughly and credibly you cover it. Rather than ranking for a single page in isolation, Google increasingly rewards sites that demonstrate genuine expertise across an entire topic, the cornerstone guide plus every supporting article around it, well linked together.
For a founder, this reframes content strategy from chasing scattered keywords to owning a clearly defined niche. If you cover one subject more completely and credibly than anyone else, you start ranking even for terms you haven't directly targeted, because the engine trusts you on the whole theme. You build it by mapping a topic into a cluster (a pillar page and the questions branching off it), publishing consistently, and interlinking it all. The practical lesson: go deep on a narrow area you can genuinely own before spreading wide, especially when you're competing against bigger sites with more domain authority.