There are various ways how you can add and control meta tags. One of them is to use the https://www.npmjs.com/package/react-helmet package.
Install:
npm i react-helmet
Use:
import './App.css';
import { Helmet } from 'react-helmet';
function App() {
return (
<div>
<Helmet>
<title>Portfolio::Marvel Template</title>
<meta charSet="utf-8" />
<meta name="description" content="Description text" />
<meta name="author" content="Author text" />
</Helmet>
</div>
);
}
export default App;
References: