the way how metadata is defined has changed from pages router to app router. I guess you are using the app router right now, so you need to use the app router syntax:
https://nextjs.org/docs/app/building-your-application/optimizing/metadata

TL;DR:
Do this:

import type { Metadata } from 'next'
 
export const metadata: Metadata = {
  title: '...',
  description: '...',
}
 
export default function Page() {}

I'm trying to export in use client

i tried exporting, but it isnt working

thx, that worked!