What is the use of Floating Report Header in Salesforce? What type of Report It Support?

Hi Suraj

It is hard to remember the headers when you are viewing a report with thousands of rows. Instead of scrolling, create floating headers by freezing columns and rows. After Spring’14 release when you scroll down to read a report, you can choose to have the header rows at the top or on the left of the report stay visiblility

Hope it may help you