I'm following a tutorial in react that has you fetch from the yelp API a few things i don't understand that i hope someone would be able to clarify.

1: they aren't using async/ await, shouldn't this be common practice in 2021?

2: i don't understand the point/use of the headers in relation to Authorization:Bearer this is a more secure way of passing the key? cant i pass the apiKey in the url?

3: there is no catch or error handling in this, why is that/ where would that be inserted if i were to implement that?

4: this tutorial has me using something called 'https://cors-anywhere.herokuapp.com/' i don't really understand the use for this. it has to do with creating a secure way of retrieving the API from my understanding? but if i wanted to deploy this project on netlify would i just remove that and pass in the normal api url to fetch from? or how would i refactor for production deployment?

At the end of the day im really just looking for some guidance on how this can be improved.

const { default: SearchBar } = require("../components/SearchBar/SearchBar");

const apiKey = 'some api key from yelp';

const Yelp = {
    searchYelp(term, location, sortBy) {
        return fetch(`https://cors-anywhere.herokuapp.com/https://api.yelp.com/v3/businesses/search?term=${term}&location=${location}&sort_by=${sortBy}`, {
            headers: {
                Authorization: `Bearer ${apiKey}`
            },
        }).then((response) => {
            return response.json()
        }).then((jsonResponse) => {
            if (jsonResponse.businesses) {
                return jsonResponse.businesses.map((business) => {
                    return {
                        id: business.id,
                        imageSrc: business.image_url,
                        name: business.name,
                        address: business.location.address1,
                        city: business.location.city,
                        state: business.location.state,
                        zipCode: business.location.zip_code,
                        category: business.categories.title,
                        rating: business.rating,
                        reviewCount: business.review_count,
                    }
                })
            }
        })
    }
}

export default Yelp