Core Web Vitals are confirmed ranking signals that affect your position in Google search results. Google rolled them out as part of the Page Experience update in June 2021, measuring three specific metrics: Largest Contentful Paint (LCP under 2.5s), First Input Delay (FID under 100ms, replaced by Interaction to Next Paint in March 2024), and Cumulative Layout Shift (CLS under 0.1). Poor scores won't tank a strong site overnight, but they create a ceiling you'll hit in competitive queries. The real-world impact sits somewhere between overhyped and genuinely important. If two pages have similar content quality and backlink profiles, the one with better vitals wins the tiebreaker. We've seen clients in Ottawa's real estate and legal sectors lose 8-12% of clicks after CLS issues cropped up from ad injections or unoptimized hero images. Fixing those brought traffic back within 4-6 weeks, but only because the content itself was already competitive. Here's what matters most for the 500+ domains we manage: - LCP struggles come from oversized images, slow server response, or render-blocking resources. Canadian hosting on faster infrastructure (Toronto or Montreal data centers) shaves 200-400ms off TTFB for local audiences. - INP replaced FID because Google wanted to measure actual interactivity, not just first click. Heavy JavaScript from tracking pixels, chat widgets, or page builders kills this metric. - CLS happens when images load without defined dimensions, fonts swap, or ads push content around. Set width and height attributes and preload critical fonts. Core Web Vitals won't save you if your content is thin or you have no backlinks, and they won't destroy you if you're slightly over thresholds but authoritative in your niche. Google's John Mueller has said outright that relevance beats speed. But in saturated markets like "Ottawa personal injury lawyer" or "Toronto condo listings," being in the orange or red zone for vitals gives competitors an edge. We treat them as table stakes, not magic bullets. Fix the technical foundation, then focus on content that actually answers searcher intent.