What is advertising and how does it relate to marketing homework help

Often students are asked to define advertising and many frantically search for the answer online. In your own words, discuss the advertising concept and how it relates to marketing? Do we need it? Why?
Here what a few online sites say about the topic. Don’t repeat what they say or copy information from an online site, use your own words.
Watch Video 

What if there was no advertising? | George Nimeh | TEDxVienna

Watch Video 

We’re All in Marketing: What Evolution Tells Us About Advertising | Ethan Decker | TEDxSMU

250 words please 
 
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