A picture is worth thousand words
That's how important BI reporting is for your business
Odoo comes with many pre-built and pre-defined BI reporting in Sales, Purchase, Inventory and Accounting modules. These reporting gives you an insight on how your business is performing at a quick glance.
A dashboard with shortcuts to all of your reporting will give you quick information about your business and ability to make decision on the go.
Should you want to go beyond Odoo BI reporting, we would suggest Power BI a product of Microsoft. A simple and powerful BI reporting engine installed directly on your computer that has capability to generate complex report based on data from Odoo's database.