A structured workout is a list of steps. A repeat block groups several steps and runs them a set number of times - a 6x800m session is one repeat block containing a hard step and a recovery step, repeated six times. In the structure chart, a bracket underneath marks a repeat block and the number beside it is how many times it runs.
Warm up and cool down bracket the session. Main is the step the workout is built around. Interval is a hard repeated effort, and Recovery is the easy movement between those efforts. Rest is a full stop with no movement, which is different from Recovery. Active is lower-effort work that still belongs to the session, such as a drill.
Most steps end after a set time or distance. An open step has no fixed end and runs until you press the lap button on your watch - useful for a warm up you want to end by feel. Some steps end on a condition instead, such as heart rate dropping below a value.
A target is the pace, heart rate, power or cadence range to hold during a step. It is a guide your watch shows you, not a limit that stops the step. A step can have no target at all, which is normal for warm ups and recoveries.
Some targets are expressed as a percentage of your threshold pace, threshold heart rate or threshold power rather than as an absolute number. The concrete range is calculated from the threshold stored in your settings, so it moves with your fitness as you update it. If that threshold is missing, the percentage is shown on its own because there is nothing to calculate from.
A scheduled workout is pushed to a connected watch automatically. The sync status tells you whether it actually arrived - it is a report rather than a button, so that a failure is visible instead of silent. If a workout did not reach the watch, there is no automatic retry.
After you complete a session, compliance compares what you did against what was prescribed. 80% or above is a good match, 60-79% partial, and below 60% means the session diverged substantially. Diverging is not automatically bad - it is a prompt to check whether the plan or the day was the problem.