What this screen is for
The Sales dashboard is the summary view of the whole Sales module. Rather than opening each list in turn, it brings the headline figures together: what you have billed over a period, what customers have paid, and what is still owed.
When to use it
Start here when you want the shape of the month before drilling into a specific document. If a figure looks wrong, the underlying list — Sales Invoices, Receipts, Customer Outstanding — is where you investigate it.