twitter:site handle is configured

The twitter:site tag attributes shared content to your site's Twitter/X account. When someone shares a page from your site, Twitter can display the site's account handle below the card, providing viewers a direct path to follow your account from within the share. Without it, the card is anonymous — there is no account context, no follow prompt, and no attribution signal that accrues to your account. Per the Twitter Cards spec, twitter:site is the mechanism by which shares generate account-level visibility. For any project that uses Twitter/X as a distribution channel, omitting this tag means every share generates awareness without routing that awareness back to the account.

Add twitter.site with your site's Twitter/X handle to the root layout metadata:

// app/layout.tsx
export const metadata: Metadata = {
  twitter: {
    card: 'summary_large_image',
    site: '@yourhandle',
  },
}

The handle must include the @ prefix. This applies globally and does not need per-page overrides unless specific pages should attribute to a different account (e.g., an individual author's handle on their profile page).