In Blent you can create a report or a dashboard. The difference is really simple ;
A report is a table, composed of lines. You can change the type, but the logic stays the same; one line, one widget (expect for specific report like Pickup or group).
To learn everything about reports, check our guide ; All about report
A dashboard is for visual representation of your data. You can imagine it like a blank canvas where you add widgets with the type of your choice.
So you can have a numeric value (KPI), and some widgets that look like a report (Table), but you can also have a donut (or camenbert for the french team), column and all different types of design that can help you find a lesson in your data.
The dashboard allows you to view trends, to spot patterns way more easily than with a report. You can add a budget to have the green VS red schema of color, that make it really easy to read.
To learn everything about dashboards, check our guide ; All about Dashboard