A dashboard shows data from source reports as visual components, which can be charts, gauges, tables, metrics, or Visualforce pages. They provide a snapshot of key metrics and performance indicators for your organization. Each dashboard can have up to 20 components. Users can view any dashboard available in a public folder in their organizaton, such as Company Dashboards, and can select a favorite, whose first three components display on the Home tab.
First try to understand about Reports,then Dashboards.
Go through Force.com Fundamentals book which will give good Idea on Reports and Dashboards.
HI,
Dashboard Def fromSF docs:
A dashboard shows data from source reports as visual components, which can be charts, gauges,
tables, metrics, or Visualforce pages. They provide a snapshot of key metrics and performance
indicators for your organization. Each dashboard can have up to 20 components. Users can
view any dashboard available in a public folder in their organizaton, such as Company
Dashboards, and can select a favorite, whose first three components display on the Home tab.
First try to understand about Reports,then Dashboards.
Go through Force.com Fundamentals book which will give good Idea on Reports and Dashboards.
http://www.salesforce.com/us/developer/docs/fundamentals/index.htm
in that Analyzing data with Reposts and dashboards
Find Below links for more information
http://www.youtube.com/watch?v=9j06dgTvOcM
http://www.youtube.com/watch?v=TJ13i-dALRM
http://login.salesforce.com/help/doc/en/dashboards_dynamic_overview.htm
http://www.salesforce.com/customer-resources/learning-center/details/best-practices/simple-steps-to-reports-and-dashboards.jsp