What is a key benefit of having multiple monitors connected to a computer?

Having multiple monitors connected to a computer significantly enhances the user's ability to multitask due to the additional screen real estate available. This means that users can have multiple applications or documents open and viewable at the same time, improving workflow efficiency. For instance, a user can monitor emails on one screen while working on a project on another, or compare data across two different applications without continually switching back and forth between windows.

While increased graphics performance could be a consideration in terms of how the computer handles multiple displays, the primary advantage of using multiple monitors lies in the increased productivity and improved ability to manage and view information simultaneously. The other options, such as improved battery life or enhanced audio output, are not directly related to the use of multiple monitors and do not reflect the main benefits that users seek when setting up a dual or multiple monitor configuration.