When you open the 25Live page for the first time you'll see what's known as the "dashboard". Once you log in and start marking spaces as "starred" (favorited) these will show up on your dashboard for quick access. . If you end up logging in you'll be able to save your own searches as well for future use.
You can log in using your LDAP crednetials by clicking the link at the top right of the page. If it's your first time signing in an account is created so your preferences can be saved for future visits.