This trigger is based on a user action, as it triggers an automation when a user purchases a product.
You can filter your AcyMailing users based on their VM fields. When using this filter, it will exclude all the AcyMailing users that are not in VirtueMart.
You can filter your AcyMailing users based on their VM shopper group. When using this filter, it will exclude all the AcyMailing users that are not in VirtueMart when using the "In" option.
Filter your AcyMailing users based on their purchases. You can refine your filters by selecting a category, or directly a specific product. When selecting a product, the category field is ignored.
You can select dynamic dates to automate a process, for example when a user purchases a hat, send an email one week later containing a -20% coupon on the Headpiece products, with the 3 last products in this category.
For example, this filter allows you to contact back the users that placed an order 1 week ago, but didn't pay yet (those are generally abandoned carts, you could ask them if there was a problem).