Core Web Vitals quantify real-world page experience: Largest Contentful Paint (how quickly the main content loads), Interaction to Next Paint (how responsive the page is to input), and Cumulative Layout Shift (how much the layout jumps around). Google uses them as a ranking signal and, more importantly, they correlate with conversion.
For an ABA or behavioral health site, poor vitals quietly cost inquiries — caregivers on mobile abandon slow, janky pages before they ever reach the intake form. Strong vitals are table stakes for both search visibility and conversion, and a common quick win in a technical audit.