Blogging involves skills such as search engine optimization, social media marketing, writing, editing, publishing posts, and designing and maintaining a website. Blogs can be created on any topic where one is an expert, such as politics, sports, web design, blogging tips, or technology. To start a blog, one can create a free account on websites like WordPress or Blogger, register a domain name, install a content management system, set up themes and features, and begin posting content. Popular blogs cover topics like digital inspiration, cooking, entertainment news, business, and travel.