Understand your customers better by sending emails and getting direct feedback.
Ask your customers how likely it is they would recommend your company to a friend or colleague using NPS – Net Promoter Score. Compare your result with the average within your industry.
You can also ask for a simple thumbs up, thumbs down or ask the recipient to rate you with one to five stars.
For every answer you get you can also receive qualitative feedback where the recipient of your newsletter have the option to write you a message.