You can get email notifications, triggered by your settings, for specific events, like:
• The tracked URLs/terms reached #1 position
• The tracked URLs/terms reached Top X position. (For example, Top 10, Top 50 etc.)
• The tracked URLs/terms kicked out of the Top X position. (For example, out of the Top 10, Out of the Top 99 etc.)
• The tracked URLs/terms rank Is/Is not at a certain rank value you set.
• The tracked URLs/terms apply a comparison condition you set.
• The tracked URLs/terms rank Is/Is not a featured snippet.
Set it from the left menu Reports Center -> Notifications -> Trigger Notifications.