If we are doing groupings for summary, matrix and join reports then what is the maximum limit for which we can do this in salesfoce?

Hi Saurabh,

Summary and joined reports can have up to three grouping levels. Matrix reports can have two row and two column groupings. For matrix reports, you can't use the same field for both row and column groupings. For joined reports, you can use the fields from the Common Fields category in the Fields pane to group across all report blocks.

Hope this will help you.