Once you have created a Timeline, you will notice it become available as a variable in the My Blueprint tab. This is done to allow for reference to the Timeline component, and is particularly useful when having to utilize the Timeline nodes. These nodes exist to allow for access to certain features of a Timeline, such as its play rate.
In this example, we are using the Get Timeline 0 variable to query the current Play Rate value of that timeline.
A wide variety of such nodes exist, allowing you to query values and control behavior of your Timeline nodes. For a complete list of the available Timeline nodes and their functionality, see the Timeline nodes page.