What should be kept in mind while developing the message for an advertisement?

What should be kept in mind while developing the message for an advertisement?

a.The message should be developed only after the target profile has been completely created.

b.The interests of the target customers also must taken into consideration.

c.The objectives of the advertisement program shoule be answered by the message.

d.The message should be such that it should be easily understood by the viewers and should contain clarity.

e.More of interactive communication tools should be used while developing the message.