Data Studio is the tool used on Google Marketing Platform for data visualization. It became extremely popular among marketers in the past couple of years. The main reason for its popularity is that it is very extremely useful for building Google Ads and Analytics reports. Actually it is recommended to use Google Data Studio instead of Google Analytics built-in functions.
Dashboards organize your data in a meaningful way and turn it into a business tool that helps to keep an eye on KPI's and to point your business in the right direction. Custom dashboards make it possible to visually depict performance of a website, specific traffic source or a campaign at the desired level of detail.
There is a great variety of tools that can be used for dashboarding.