Conventions of a magazine advert

Conventions that are typically on a music magazine poster would be:

• Release Date
• Image -> particularly the same as the CD
• Name of artist
• Name of album
• "Includes the single".. information like that
• Record label logo
• Artist website (possibly the record label website)
• Writing explaining that it is out now (possibly show some of the stores it's in).

All of these things are important and provide the right amount of information needed for an individual to buy the CD. However, it is important that you don't fill the poster up with too much information else no-one would pay attention and look. Also, it makes it look unprofessional.