Key account manager. KA means KeyAccount, which is an important account when translated into Chinese. KA Commissioner, also called key account manager, is a staff member who specializes in serving the most important customers in the company's business, and is a more important and special position in sales positions. In general enterprises, the proportion of customers in the company's revenue also conforms to the distribution of the 28 th Law, that is, 80% of revenue depends on 20% of customers. And the card specialist is to serve these 20% customers. KA Commissioner is different from ordinary sales, and KA Commissioner needs to contact important customers of development companies. These customers are equivalent to the company's parents, so the requirements for KA specialists will be stricter than general sales.