Often, you can find yourself wanting to keep an offline record of a web page: you may be traveling, and won't have internet access, or perhaps you need a static copy of the page for your archives. Either way, Acrobat's web capture feature can be an invaluable addition to your bag of tricks.
Here's how to capture a web page in Acrobat:
Drag and drop the link from your internet browser into an open Adobe Acrobat browser. OR
Select File > Create PDF > From Web Page > then type in the appropriate web link (Keyboard shortcut: Shift + Ctrl + O).
Using the second method, it's also possible to capture multiple layers (e.g. the page, plus the destinations of all links on that page) of a web page, or even the whole site -- perfect for browsing web content at your leisure during long-haul flights!
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.