Screen dumps are often used in VC pitch presentations; either to showcase the company itself, or to give examples of competitors in the market. These screen shots are often filled with excess visual details:

The Windows title and scroll bars (sometimes with personal information such as instant messaging windows or the names of other web sites that are open on the screen)
The menu navigation structure, login windows, banner ads that surround the core web site.

Cut this clutter to create a much calmer slide that allows you to focus on what feature/aspect you would like to highlight.