1. Newsletter Contents:

The newsletter from PopuMusic, sent by PartyKeys, requests quick feedback through a survey to enhance the PopuMusic experience and future updates. The survey is estimated to take 3-5 minutes to complete. Participants are incentivized with rewards:

• Everyone who completes the survey will receive a limited-time 10% off discount code (valid for 48 hours).
• 2 randomly chosen participants will win a Popupiano Full Set.
• 5 participants will receive a $100 Popupiano coupon.

2. Products:

The newsletter doesn't provide explicit information about the products besides the mentioned Popupiano Full Sets and $100 coupons. However, based on the rewards, it suggests that Popupiano products are likely related to music or musical instruments.

3. PopuMusic Store (popumusic.com):

Although specific details about the store are not given in the newsletter, we can infer that PopuMusic specializes in music-related products, particularly the Popupiano Full Sets mentioned in the rewards. The domain popumusic.com implies a focus on music and suggests a wide range of musical instruments or accessories available for purchase.