Welcome back! Previously, you learned about using the watch command to implement controlled transactions in Redis. This powerful feature allows you to monitor keys and ensure updates are made safely when specific conditions are met. Now, we'll build upon that knowledge and introduce the unwatch command, which will give you even more control over your transactions by allowing you to cancel the effects of a watch.

In this lesson, you'll dive into enhancing transaction control using the unwatch command. Specifically, you will learn:

1. Using unwatch to Cancel Monitored Keys: How to stop monitoring keys when certain conditions within your transaction are not met.
2. Implementing Conditional Updates with unwatch: Writing functions that ensure changes are only made when valid and safe to do so.

Let's walk through a practical example to make this concept clearer: