A paragraph (from the Greek paragraphos, "to write beside" or "written beside") is a self-contained unit of a discourse in writing dealing with a particular point or idea. The start of a paragraph is indicated by beginning on a new line. Sometimes the first line is indented; sometimes it is indented without beginning a new line. At various times the beginning of a paragraph has been indicated by the pilcrow: ¶.
A paragraph typically consists of a unifying main point, thought, or idea accompanied by supporting details. The non-fiction paragraph usually begins with the general and moves towards the more specific so as to advance an argument or point of view. Each paragraph builds on what came before and lays the ground for what comes next. Paragraphs generally range three to seven sentences all combined in a single paragraphed statement. In prose fiction successive details, for example; but it is just as common for the point of a prose paragraph to occur in the middle or the end. A paragraph can be as short as one word or run the length of multiple pages, and may consist of one or many sentences. When dialogue is being quoted in fiction, a new paragraph is used each time the person being quoted changes.
Indentation, not being as easy on LiveJournal or any blog for that matter as it is on word processing software, is optional.