As Account Manager II I serviced the South Orange County area, about 90 accounts, small store and drug chains. (CVS,Walgreens, Rite Aid) I would inventory account, set coolers, write orders, in drug stores follow sale ads and order, build displays, and rotate inventory.
The most important role as a sales manager is communication skills, being able to service all accounts needs and follow through with store managers and owners, make sure you close all sales calls before you leave location.
Your co-workers, again communication and don't be afraid to reach out, and help others when needed.
The hardest part of the job was a life balance, working up to and over 15 hours daily and no less the 12 hours daily.
The most enjoyable part of my job was in the 33+ years with Coca-Cola, the relationships that I have with co-workers/store owners/ and management.