1. A blog is an online journal or website where an individual shares commentary, descriptions of events, and other content like graphics or videos, similar to a personal diary. 2. Creating a blog involves first making a Google account with an email if you don't have one. You then use Blogger.com to choose a template and name for your new blog, which is connected to your Google account. 3. Blogs allow you to share your thoughts, engage with others, and learn about technology. They provide flexibility to customize the blog with themes, elements, and configuration settings.