In computing, a tag is a piece of code that is used to markup a document in order to describe its content. The most common use of tags is in HTML, where they are used to markup text in order to indicate how it should be displayed by a web browser. For example, the <p> tag is used to markup a paragraph of text, and the <b> tag is used to markup text that should be displayed in bold.
Tags can also be used in other markup languages, such as XML. In XML, tags are used to markup the elements of a document. For example, the <book> element might be used to markup a book, and the <author> element might be used to markup the author of a book.
Tags can also be used in programming languages, such as Java. In Java, tags are used to annotate code. For example, the @Override annotation can be used to indicate that a method is overriding a method in a superclass.
In typography, a tag is a small superscript, typically at the end of a paragraph, used to indicate that the following paragraph is of a different nature. The most common use is to signal the start of a new section or chapter.
Tags are also used to signal a change in the tone of the text, such as a change from formal to informal, or to indicate a change in the level of detail, such as a shift from summarizing a topic to delving into its specifics.
Tags are an important part of paragraph setting because they help to delineate where one paragraph ends and another begins. They also help to give structure to a piece of writing by helping to identify which parts belong together. In addition, tags can be used to highlight certain words or phrases, which can be helpful for readers.