Management
1) Helping you with major career decisions, such as deciding which record company to sign with, whether to make a publishing deal, how much to ask for, etc.
2) Helping you with the creative process, such as selecting a producer, deciding which song to record, hiring band members, selecting photographers, etc.
3) Promoting your career by hyping you to everyone the manager meets, helping coordinate a publicity campaign, etc.
4) Assembling and heading your professional team by introducing you to lawyers, business managers and agents and overseeing the work these people do.
5) Coordinating your concert tours by working with your agent to make the best deals with promoters, routing the tour, working with your business manager to develop and implement a budget, assembling your road crew, supervising the road and tour managers to make sure all runs smoothly, etc.
6) Pounding your record company to maximize the advertising and marketing campaigns for your records, making sure your records are treated as priorities, screaming at them when they do wrong and praising them with they do right.
7) Generally being a buffer between you and the outside world such as fielding inquiries for commercial endorsements, personal appearances, charitable requests (both for money and your smiling face), taking the rap for tough decisions that you make but don’t want anyone to think you did.