Yelp is one of the biggest business directory and reviews service in the world. Yelp data is also used in thousands of places online and improving your presence and reputation here will have benefits beyond the yelp site and app. It is highly recommended that you list your business here.
The popularity of this service on social media and on various traffic metrics. You should look at Moz Domain Authority and Alexa Rank and compare to other services to determine how popular this service is in comparison to other services.
Must List
This service is considered to be a Must List service because it provides significant opportunities for your business. These services often are heavily used by consumers or your data on this service is used by many other services and apps. Not having a presence will mean your business will not be listed in many places online.
Classified as a Business Directory.
Having a presence is free.
Can run advertisements.
Predominately delivered as an app (iOS, android, windows).
You can reply to reviews.