Lets say you applied at Google/FB/Apple/30 Start Ups.
You have issues remembering all of the statuses of the applications, as trying to remember 30+ jobs is hard. Follow ups, Emails, Stages, Interesting Links you found on their recruiting process, To Dos, Resume Version sent (if you applied to couple of positions and highlighted different skills). Point of Contact, Last contact. List of contacts.
Report page showing companies with most interactions.
Offer page showing offers you have received and comparing them.