Tabular reports are the simplest and fastest way to look at your data. Similar to a spreadsheet, they consist simply of an ordered set of fields in columns, with each matching record listed in a row. They're often best used for tasks like generating a mailing list.
Reference:
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.
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