An SEO dashboard is typically a web page showing useful summary performance about your website’s organic traffic.
You can create an SEO dashboard easily in an SEO platform like Authoritas or another website analytics platform (e.g. Adobe, Google Analytics) or general SaaS dashboarding software (e.g. Domo, Google Data Studio, Klipfolio and hundreds of others) and in specific business intelligence tools (e.g. PowerBi, Tableau) if you connect them to your database or APIs.
The best SEO dashboards combine and summarise headline data from many different sources such as Google Analytics, Google Webmaster Tools, a keyword rank tracker like Authoritas, a website crawler and a link data provider like Majestic.
The important consideration is context; you really need to understand who your competitors are and how they are performing to determine how well you are doing and what you need to do to perform even better.