Double click on the icon that was put on your desktop to run the TeamSpeak 3 program. It should look like the picture below.
Open the Bookmark Window
At the top left of the TeamSpeak 3 program you'll click on the "Bookmarks" menu then click the option named "Manage Bookmarks".
Add a Bookmark
In the Bookmarks Window, please click on "Add Bookmark".
Editing a Bookmark
Click on the New Bookmark you just created, or the one you wish to edit. Please fill in; a Label, your Server Address, Nickname and a Server Password if needed. Then click Ok.