What is bucket field in Salesforce reports?

Hi Aditya,
Bucket field in Salesforce Reports is an incredible powerful functionality used to quickly categorize values for a field in a report without the need to have a custom formula field at the object level. When you create a bucket field in Salesforce, you define multiple categories into groups depending on the record values, this bucket field will not affect other Salesforce reports. Bucket fields in Salesforce are available in Tabular reports, Summary Reports and Matrix reports. Joined Reports does not support Bucket fields.
Salesforce Reports are used to generated data and display the data in the form of Rows and Columns with rule criteria. Every reports in Salesforce is stored in Folders. We can set folder to hidden, Shared, read-only or read/write. If we need to categorize multiple number of values of a field into one category, then we go for Bucket fields in Salesforce.
Thanks,
Visali.