Add Dashboard Filters in Lightning Experience
Add, edit, or remove filters from your Lightning Experience dashboard directly from the lightning dashboard builder. Filters let people choose different views of a dashboard, so one dashboard does the job of many. Without dashboard filters, you’d have to create multiple dashboards, each with its own set of filtered reports. For example, add a filter on the industry field to track opportunities by industry. This feature is new in Lightning Experience.
To add a dashboard filter, click + Filter.