With the following code, you can use google analytics with Next.js App in the header section
import Script from 'next/script' import Head from 'next/head' export default function Index() { return ( <> <Head> <title>Next.js</title> </Head> <Script src="https://www.googletagmanager.com/gtag/js?id=GA_MEASUREMENT_ID" strategy="afterInteractive" /> <Script id="google-analytics" strategy="afterInteractive"> {` window.dataLayer = window.dataLayer || []; function gtag(){window.dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'GA_MEASUREMENT_ID'); `} </Script> </> ) }