Here’s an interesting feature inspired by the BigSEO Newsletter (known for its data-driven, no-fluff, action-oriented SEO insights): The Hook: Most SEOs track Google updates by vertical (e.g., "the March Core Update hit health sites"). But BigSEO’s newsletter data suggests a more chaotic reality: a change meant for one industry often spills over into completely unrelated niches due to shared infrastructure, tooling, or content patterns .