The claim
Building interlinked topic clusters that comprehensively cover a subject strengthens topical authority and supports rankings across the cluster.
What the evidence shows
Multiple industry analyses and the widely adopted pillar-and-cluster model report that comprehensive, well-interlinked topical coverage outperforms scattered one-off pages. While Google does not confirm a single 'topical authority' score, the correlation between depth of coverage, internal linking and visibility is consistently observed across studies and aligns with helpful-content guidance.