What is an Azure Worker Role

A Worker Role is defined as any role in Azure that runs applications and services level tasks, which generally do not require Internet Information Server, also referred to as IIS. In Worker Roles, IIS is not installed by default. They are mainly used to perform supporting background processes along with Web Roles and do tasks such as automatically compressing uploaded images, run scripts when something changes in database, get new messages from queue and process and more.

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