There are generally 6 types of music managers that can play a role in the careers of musicians, bands, and artists.
1.    Music Manager:    The Music Manager has the most interaction with the artist and is generally the most important person in the artist musical career.  They are involved in planning, coordinating & organizing the career of the artist.  They are involved in counseling and advising the artist on all matters related to their careers.  The person manager should research the music industry and know all about record labels, publishing companies, producers, booking agents, promoters, publicists, stylists, photographers, recording engineers, graphic designers, video directors, music licensees, etc. and know how they integrate themselves into the overall career plan.  The more contacts the manager has, the more effective, they will be at their job.
2.    Business Manager:    The Business Manager (usually an accountant by trade & education) manages the income, and expenses of the artist. Business Managers usually takes care of making payments to the musicians, background singers, roadies, tour managers, etc. on behalf of the artists.  They also advise the artist on assets and investments, savings, and taxes (local, state, federal, and international). Most artists are unaware that they have tax obligations that relate to their performance and licensing income, CD’s and Merchandise sales, equipment purchases, sponsorship cash, and other income, etc.  Business Managers also try to get their clients to invest in their future and save for a “rainy day” & retirement, since even the most successful artists eventually stop earning income from making records and touring.
3.    Road Manager:    The Road Manager normally takes care of the logistics while the artist is on the road/touring.  Duties include making sure that every thing on the road is provided as spelled out in the contract and all monies are paid on time.  The artist is then left free to focus on their performances and not whether the promoter, venue booker, and booking agent have met their obligations.  The Road Manager also follows up on items that were promised as part of the contract such as accommodations, per diems, equipment rentals, commissions, etc.
4.    Tour Manager:    The Tour Manager on larger tours coordinates all the road managers along with the details and logistics of the tour itself.  Sometimes the road manager & tour manager will be and can be the same person.  The Tour Manager is in charge of all the details that related to the entire tour, including communications, merchandising, tour routing, catering, hospitality, etc.
5.    Production Manager:        Production Managers can be fond on larger tours involving major record label artists.  Production managers work closely with tour managers helping with certain details having to do with the production of the show like renting sound, video, and lighting equipment dealing with trucking issues, etc. Production managers also deal with the publicity for the show, as well as assist with scheduling, and coordinating both the touring crew and the local venue crew (stagehands, carpenters, riggers, etc.)
6.    Technical Manager:        The Technical Manager (Technical Director) is usually the person in charge of set design, construction and control during the performance.  The work closely with the Production Manager