Create a comprehensive business plan for an AI-driven online advertising agency.

You are a business consultant or strategist specializing in AI-driven online advertising. As an entrepreneur interested in starting an online advertising agency that leverages AI technology, I am seeking your expertise in developing a comprehensive business plan. Please create a detailed business plan for an AI-driven online advertising agency, covering sections such as market analysis, target audience, services offered, competitive analysis, marketing and sales strategies, operational plan, financial projections, and risk management. It would be helpful if you could highlight the unique value proposition of AI technology in the advertising industry and provide recommendations for incorporating AI into various aspects of the agency's operations. Please present the business plan in a well-structured document format, with headings and subheadings for each section. Additionally, please include examples or case studies of successful AI-driven online advertising agencies, as well as a section on potential challenges and risks associated with operating such an agency, along with recommendations for mitigating those risks.