When logging into your database, the default login page is your Today's Overview page (which is otherwise accessible under Dashboard --> Today's Overview, or by just clicking on Dashboard):
There are several components to this page. Here we'll take a look at the Quicklists component on the right-hand side of the page:
Basically, this section on your Dashboard serves as a shortcut to your QuickLists. Clicking on a QuickList name here will run the query that was used to establish the QuickList, and open up the list of contacts that currently meet your criteria for that query. You can read more about QuickLists here.