Matrix reports allow you to group records both by row and by column. These reports are the most time-consuming to set up, but they also provide the most detailed view of our data. Like summary reports, matrix reports can have graphs and be used in dashboards.
https://trailhead.salesforce.com/de/content/learn/modules/lex_implementation_reports_dashboards/lex_implementation_reports_dashboards_report_formats#:~:text=Tabular%20reports%20are%20the%20simplest,like%20generating%20a%20mailing%20list.
Please mark as Best Answer if above information was helpful.
Thanks,