Overview a blog with three posts about a business issue of interest to you and that provides content that is valuable to others. You should develop the blog with a specific audience in mind and provide original, insightful entries. 

Ask yourself: Who am I communicating to? Who is my audience and write with that audience in mind. Also, you should develop your blog with your own career interests and desired online reputation in mind. Each entry should have paragraphs. Your first blog post should welcome readers, introduce yourself and provide an overview of what to expect from your blog. Your second and third blog posts are to be on certain topics that you devise (and that are meaningful to you). Think of a blog name that will interest readers (come up with an attention-grabber) and also try to come up with similar engaging and descriptive titles for your blog posts. In the past most students use Blogger (easiest) or Wordpress (more complicated but more customization options). 

Here are some helpful links for setting up a Blogger account: https://www.wikihow.tech/Start-a-Blog-on-Blogger