Core Web Vitals are three specific numbers Google uses to grade real-world page experience: how fast the main content appears, how quickly the page reacts when you tap or click, and how much the layout shifts around as it loads. Google folds them into ranking, and people feel them directly, slow, janky pages get abandoned.
The reason they matter so much for local business is that most of your visitors are on a phone, often on cellular, often in a hurry (a clogged drain, a search for dinner). A site that takes eight seconds on a phone loses people who would have called. The industry rule of thumb: most give up by three seconds.
You will often see these summarized as a "PageSpeed" or "Lighthouse" score out of 100. A modern, well-built site lands in the 90s; a typical bloated template site crawls in around 40. The gap is something your customers feel even if they never name it.
Run your own site through Google’s free PageSpeed Insights tool on the "mobile" tab. The number it returns is essentially your Core Web Vitals report card.
Go deeper: Next.js vs WordPress for Small Business Websites.
This is part of our Web design work.