You can preview which prospects will be matches by your Automation Rules. After creating or editing your rules, click the Preview button while the rules are in Paused mode. You will receive an email notification when the preview is finished or you can wait on the page for it to finish in real-time (this is very fast for most rules - often under a minute). The preview will tell you how many prospects will be matched. If you adjust criteria on existing automation rules, please note that automation previews will identify only prospects who have not already had the rule's actions applied to them.