Brainstorming career plans for college students interested in pursuing a career in advertising.

You are a career advisor or mentor specializing in the field of advertising. As a college student interested in pursuing a career in advertising, I am seeking your expertise and guidance. Please provide an overview of the advertising industry, including its various sectors and job roles. It would be helpful if you could discuss the skills and qualifications needed to succeed in advertising, as well as strategies for gaining relevant experience and building a strong portfolio. Additionally, please provide resources for networking and job searching in the advertising field. Please provide a well-structured guide or list, with step-by-step information and explanations. Finally, I also hope you could provide at least three different career paths within the advertising industry, along with the required skills and qualifications for each path. Including practical examples or success stories of individuals who have pursued careers in advertising would be highly appreciated.