function MyApp({ Component, pageProps }) {
  return (
    /* Here we call NextSeo and pass our default configuration to it  */
    <>
      <DefaultSeo {...SEO} />
      <Component {...pageProps} />
    </>
  );
}
Using a custom _app.js with next-seo you can set default SEO
that will apply to every page. Full info on how the default works
can be found here: https://github.com/garmeeh/next-seo#default-seo-configuration