What is difference between Physical Page and Logical Page?

Physical Page: 

• Physical Pages let you precisely controls the way the pages will break in the report.
• Physical Page size is paper size.
• The paper size is that you specify for the report controls how the report is rendered.
• By Default the page size is 8.5 by 11 inches.
• Rendering formats for Physical page: Image, PDF, Word
   

Logical Page: 

• These pages are calculated at run time on the number of columns and rows and you do not have any precise control over the page break.
• Rendering formats for Logical Page: Excel, HTML