This allows you to save the drill paths and filter values you have currently applied to the report in order to reapply them to fresh data at a later date.
In order to save a Bookmark of your report, in its current filtered and drilled state:
Click on the Bookmarks menu in the Report Builder
Select the Create Bookmark option from the displayed drop down menu
Fill in the details required in the Create Bookmark lightbox
Name: provide a name for your bookmark
Description: provide a description of your bookmark Note: We recommend you describe the report so users understand what filters have been applied.
Security: initially the bookmark will be Public (open to anyone that has access to the category and sub category the report is stored in), to secure the bookmark simply select users or groups that should have access.