Adding a chart to a report is a good practice; the audience will get a quick glimpse of the report's content and will find it easy to understand the data with visualization. You can add a chart to any type of report format except a Tabular report. However, the Tabular report with Row Limit and Dashboard Settings allows the report to be used as a data source report for dashboard. We will discuss dashboards in Chapter 9, Building Dashboards in Lightning Experience.
If you are switching from Classic, you need to be in the report builder by editing/customizing the report when you would like to add a chart in a report or modify an existing chart in Classic. However, the whole concept is changed in Lightning; you add or modify an existing...