Characteristic Of an Advertisement

Usually an advertisement is made to persuade the audience (viewers, readers or listeners). But, There are also characteristic of an advertisement:

• Its bright, colorful, it catches the eye.
• It needs to clearly display the product being advertised.
• It needs to be organized. (not random pictures everywhere).
• It needs how/where to get it info such as "available at Wal-Mart".

(source: http://wiki.answers.com/Q/What_are_the_4_characteristics_of_a_good_advertisement)