How to create a Yelp API key?
If you do not have a free Yelp account (not a business), please Sign Up Here
Under the free Yelp account, go to the Yelp developers page and create a new app
Copy API Key
How to get Yelp business URL?
From the browser go to your business page
Copy the business URL from the address bar. Your business URL looks like this https://www.yelp.com/biz/breakfast-little-san-francisco-2