This depends on the context. Very often dashboard in computing means a 'page' or collection of 'pages' which intuitively show you information about current situation. For example consider a car dashboard or a dashboard in the cockpit of an airplane.
The technology itself is typically irrelevant. It could be done using ASP.Net pages but other technologies are as feasible as ASP.
For more information, refer for example to
Dashboard (management information systems)[
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