Structurally, blogs are organized like diaries, with individual entries written by the same author or group of authors. The most recent entries (posts) are displayed at the top and older posts are pushed down into archives, meaning that blogs are time based and especially well suited for presenting current information about a campaign, event or organization. A blog’s author (or authors) ensures that the posts are kept on-topic, and fit into the overall theme, issue or campaign. Some blogs allow visitors to post comments on individual articles. These comments appear below each article, and may form a mini-dialogue between readers and the author about that individual post, but the overall authorship and leading voice of the blog remains in the hands of the author(s).