Can someone explain me the meaning of this symbol ( “ ) in React [duplicate]

Recently sarted learning react and i do not understand the use of this symbol ( “ )
I have shared the code below as it is used after styled.nav`

import { NavLink as Link } from 'react-router-dom';
import styled from 'styled-components';
  
export const Nav = styled.nav`
  background: #63D471;
  height: 85px;
  display: flex;
  justify-content: space-between;
  padding: 0.2rem calc((100vw - 1000px) / 2);
  z-index: 12;
  /* Third Nav */
  /* justify-content: flex-start; */
`;