This document provides an introduction to blogs, including what a blog is, blog themes, blog posts and pages, sharing links, allowing comments, blog contents, and search engine optimization (SEO). Specifically: - A blog is an online diary that can be used for purposes like advertisements and guides. - Blog themes determine the appearance of a blog. Blog posts are where articles are written and blog pages are more static areas that remain the same over time. - Links can be shared on social networks and comments can be allowed or restricted to certain people. Good blog contents and SEO can help boost traffic.