Briefly describe the elements of online advertising.

1, customer needs: website advertisements, whether hard or soft, are presented or stated around customer needs. Customers may need to promote brands, or they may need to promote an activity, and advertising exists as a help to the project.

2, KPI assessment: CPC/CPM/CTR are often used, and whether the advertisement (especially hard and wide) meets the standard is the key; If it is soft, it may be the strength of operation: such as the number of participants, the depth of participation, the influence of activities and so on.