Tag, known as 标签 in Chinese, is a newly emerged term on the Internet and one of the representative words of Web 2.0. Tags provide an entirely new way to classify, collect, and mark information such as links, content, images, and articles.
Simply put, a tag is a "keyword" for an item (which can be an article, image, etc.). On the Internet, this "keyword" will be associated with a webpage, a link, or even a website. An item can be marked by one or multiple "tags." The way to add tags is entirely up to you, without any restrictions, making it convenient to organize, memorize, and search for information. In this way, we have a new method for flexibly categorizing and managing known items. It can be said that tags are a great idea that unifies free classification and orderly classification! Why not add your own tags?
The "Tag Cloud" (标签云集) is a page where all tags are placed and compared uniformly. Generally speaking, different colors and fonts are used based on how frequently a tag is used and how popular it is. The more popular and frequently used a tag is, the more prominent it will appear on this page. The homepage of this site is a good example.
Many websites at home and abroad use tags (Tag) to manage categorized content. You can refer to these websites for explanations about tags: Flickr (photos, English), Del.icio.us (bookmarks, English), Last.fm (music, English), 365Key (web摘), DoNews (web摘), and the meaning of Tag in Baidu.