The ladder's manage page contains buttons to edit and publish the ladder (if it is in draft) or edit and change the status (if it is published), plus a duplicate button to make a copy of the ladder. You can view the ladder's overall notes by clicking the notes icon next to its name. The manage page contains the testing section, described here.
Underneath that are overall ladder statistics, showing the number of activists who've entered and then exited the ladder, as well as the number of activists currently waiting inside the ladder.
Below that is a representation of your ladder's rungs and steps. You can view each step's notes by hovering over the notes icon next to it. Each wait step has a stats button that when clicked will show you the number of activists currently waiting at that step. Each send an email action step has a stats button that when clicked will show you all of the email statistics for that step's email (opens, clicks, unsubscribes, etc... -- all of the statistics you normally get with our mass email). And each exit will have a count of the number of activists who specifically exited at that exit.