What Docking Stations are for
The ability to use a different monitor on a laptop is handy for computer games or the small netbook screens that can be difficult for many users to read.
Allow Desktop Power and Laptop Mobility
Docking stations allow the user to combine the conveniences of a desktop with the conveniences of a laptop.
Notebook Manufacturers
Many notebook manufacturers do not make docking stations, and most modern laptops have enough ports. These stations are convenient for netbook and tablet PC users, as the ports are limited on these devices.
Add Additional Hard Drive Storage to your Laptop
Many docking stations have space for extra hard drives, an option that is not available on many laptops.
Manufacturer Specific
Docking stations are made for a specific model of notebook computer most of the time. Check with the 3rd-party manufacturer that sells these peripheral devices before buying one for your notebook or ultra-mobile PC.