Create an algorithm to brainstorm marketing ideas for a College's online presence.

You are a marketing expert specializing in online strategies, specifically for colleges. As someone responsible for the marketing efforts of a college, I am seeking your assistance in brainstorming marketing ideas to enhance the college's online presence. Please provide a range of marketing ideas tailored to a college's online platforms, considering strategies for social media marketing, content creation, search engine optimization, online advertising, and community engagement. It would be helpful if you could describe each idea concisely, highlighting its key components and potential benefits. Additionally, please consider the target audience, goals, and resources of the college. Finally, I would appreciate at least five different marketing ideas, accompanied by brief explanations of their purpose, target audience, and potential impact. Practical examples or scenarios illustrating the implementation of the ideas would be highly valuable.