Music Institution - Who makes and produces magazines?

I feel that it is extremely important for us to know about the production of music magazines, in order for us to understand how important the process is and how it affects people who but them.

Magazines are a generally published on a regular schedule. They are generally financed by advertising, purchase price, pre-paid magazines subscriptions or all three.
How can magazines be distributed?
Magazines can be distributed through the mail, through sales by news-stands, book-stores or other vendors; or through free distribution at selected pick-up locations. Sales models for distribution fall into three main categories.
Bauer Media

Bauer Media is a division of the Bauer Media Group, Europe’s largest privately owned publishing Group. The Group is a worldwide media empire offering over 300 magazines in 15 countries, as well as online, TV and radio stations.

Bauer Media joined the Bauer Media Group in January 2008 following acquisition of Emap plc’s consumer and specialist magazines, radio, TV, online and digital businesses. Collectively, the Group employs some 6,400 people.

Bauer Media is a multi-platform UK-based media Group consisting of many companies collected around two main divisions – Magazines and Radio - widely recognised and rewarded as being industry innovators. ----------------> research found from the interenet.   Latifa. Avenell