ChatGPT just wrote this comparing using Teaser Copy versus a Sneak Peek design on your envelope. What do you think?

In direct mail, both teaser copy and sneak peek designs on envelopes can be effective in grabbing the recipient's attention and increasing the chances of them opening the mail.

Teaser copy is a short phrase or sentence that is printed on the outside of the envelope to entice the recipient to open it. It can be a question, a provocative statement, or a hint of what's inside the envelope. The advantage of teaser copy is that it can create curiosity and excitement in the recipient, leading them to open the envelope to find out more.

On the other hand, a sneak peek design on the envelope is a visual element that gives the recipient a glimpse of what's inside the envelope. For example, a picture of a product or a graphic element related to the content of the mailer. The advantage of a sneak peek design is that it can create a sense of anticipation and expectation in the recipient, prompting them to open the envelope to see more.

Ultimately, whether to use teaser copy or a sneak peek design on the envelope will depend on the specific campaign goals, target audience, and the content of the mailer. A/B testing can help determine which approach works best for a particular campaign.