Answer:
if there is a particular ad you are referring to, PLEASE ATTACH IT so I can better answer your question.
In general,
the purpose of an ad can be:
to persuade the audience to participate in their product or service like clothing ads or an ad for a new store for example.
to persuade them to practice something or stay away from something such as a healthy eating ad or a PSA ad on staying away from drugs for example.
<em>It</em><em> </em><em>really</em><em> </em><em>depends</em><em> </em><em>on</em><em> </em><em>the</em><em> </em><em>type</em><em> </em><em>of</em><em> </em><em>ad</em><em> </em><em>and</em><em> </em><em>the</em><em> </em><em>purpose</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>ad</em><em>.</em>
The ancient greece created it
Electric field potential, potential drop, or the electrostatic potential
To get resources such as water,food,and transportation
