This is a feature where you can manage the cipher puzzles you have created on the computer you are using. This package doesn't use any accounts or passwords, so you need not remember that information. On the other hand, anyone using the computer can also manage your puzzles. This isn't Internet banking...
Remember that your puzzles only exist for a couple of months. If you want to make a permanent collection for yourself, you can use your browser's "Save As..." function to save the puzzle on your computer, and then later load that puzzle in by browsing to your file by using the "Browse" button at the bottom of the page where you make puzzles.
You can perform the following actions on your puzzles:
You have made a positive recommendation for the following puzzles. Presumably, you liked these puzzles. You can remove the entry here if you wish.