What is the use of bursting a report

Hi all
Will anyone plz explain me what is the use of bursting a report and explain how to burst a report and please explain me some performence tuning tips?

[b]Question asked by visitor sudhakar.nandigam[/b]

Burst a report to distribute its contents to various recipients. Bursting is the process of running a report once and then dividing the results for distribution to recipients who each view only a subset of the data. For example, salespeople in different regions each need a report showing the sales target for each country. You use burst reports to send each salesperson the information they need. Burst reports can be distributed by email or saved to a directory for viewing in Cognos Connection.