其次，由于网络营销预算相对较小，多数大公司把购买决策权外包给媒介采购人员。
Second, since digital marketing budgets are relatively small, most big companies outsource most of their buying decisions to media buyers.
为客户准备及投放广告的公司。这些公司有专门的媒介部门从事广告时间的策划，购买及评估。
A company that prepares and places advertising for its clients Agencies typically have media departments that specialize in planning, buying, and evaluating advertising time.
为客户准备及投放广告的公司。这些公司有专门的媒介部门从事广告时间的策划，购买及评估。
A company that prepares and places advertising for its clients Agencies typically have media departments that specialize in planning, buying, and evaluating advertising time.
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