By default, actions run one after another, in the order shown in the alert.
Two toggles change this, both in the alert's Actions section:
Toggle
What it does
Execute All Actions At Once
Every action starts at the same time instead of taking turns. Faster, but the order is not guaranteed.
Stop on Action Failure
If an action fails, the ones after it are skipped. Only available when actions run one at a time.
One action feeding another
If you want a later action to use an earlier action's result, such as putting the final PiShock intensity into a chat message, leave Execute All Actions At Once turned off. Results are only passed along when actions run in order.
Most text fields accept placeholders, so you can drop the viewer's name or the tip amount straight into a message. Click the {{ }} button next to a field to browse everything available.