Research and write a 400-500 word article - The role of a product manager

Num. of articles: 1
Words per article: 400-500
Information for the blog/website: The role of a Product Manager
Topic: The role of a product manager
Tone: Informal/Casual
Outline & Structure: I require a 400-500 word article that summarises the role of a product manager

Resources such as this have a view;

http://www.mindtheproduct.com/2011/10/what-exactly-is-a-product-manager/
http://www.svpg.com/assets/Files/productmanager.pdf
https://en.wikipedia.org/wiki/Product_management

I need the reader (who will be or aspiring to be a product manager) to say "I am one of those" after reading the article

Remember to state when you would deliver the article.
Extensive research needed: yes
Extra notes: