I love that I can sendan email to a small list of subscribers who are interested in a certain type of information. This prevents me from sending the email to people who are not interested thus avoiding spam complaints or unsubscribing.

What I love most is that a subscriber can be given different tags based on links they've clicked, forms they've filled out, etc. And then those tags are available for segmentation. They just unveiled a new visual automation tool. It's pretty powerful and it really helps visualize the paths customers are taking through our email sequences.

The segmenting capabilities are awesome. You can create so many different rules and tags so that even though you're automating your emails, your users will still get a custom experience depending upon how they joined your list.