Final answer:
Digital dashboards are data mining tools that display key information gathered from multiple sources on a computer screen in a format tailored to the needs of an individual knowledge worker.
Step-by-step explanation:
The data mining tool that displays key information gathered from several sources on a computer screen in a format tailored to the needs and wants of an individual knowledge worker is digital dashboards. Digital dashboards enable users to visualize and analyze data from various sources in real-time, allowing them to make informed decisions. These tools provide customizable visual interfaces that present data in a visually appealing and easy-to-understand manner, helping knowledge workers to gain insights and take actions based on the information displayed.