Although you can use Konqueror's bookmarks to record the locations of your own files and directories, they are most useful when you are surfing the Web, letting you build up a list of useful sites.
To open the Bladwijzers drop-down list you may either LMK click on the Menubar Bladwijzers item, or use the Alt-B hotkey. Once the list is visible, you can navigate through it with the arrow keys or with your mouse, then press Enter or LMK click to visit the selected location.
To add a new item to the list use the Menubar Bladwijzers->Add Bookmark item or Ctrl-B when you are viewing the web page.
You can organize and categorize your list of bookmarks by adding subdirectories using the Menubar Bladwijzers->New Folder item.
Your bookmarks are saved as .desktop files in a normal directory, which you can open with the Menubar Bladwijzers->Edit Bookmarks item to delete any unwanted bookmark or move it to a subdirectory. You can also change the displayed name by selecting it in the Bookmarks directory with RMK, picking File Properties from the drop-down menu and modifying the name in the General tab page. Whatever new name you choose must end with .desktop.
If you are also using Netscape, then a Netscape Bookmarks folder will automatically be added to Konqueror's bookmark list so you can use your Netscape bookmarks in Konqueror.
If you have chosen to include a Bookmarkbar in Konqueror's window, then the drop-down menu will also include an entry for the Bookmark Toolbar, allowing you to add new entries or subdirectories. You will find the Bookmarkbar links in the subdirectory "Toolbar" of the normal Bookmarks directory.
If you have a dual-boot Linux/Windows system, then Internet Explorer's File->Import and Export->Export Favorites option will create a .htm file containing links to your IE favourites. From within Konqueror you can then, as long as you have access to the Windows partition, find that file and add it to your bookmarks. In this way you can access all of your old IE favourites.