Web pages are mostly HTML documents, allow the author of a web page to control the display of page contents on the Web, and express their emphases on different parts of the page. We can make use of the tag information to improve the effectiveness of a search engine.
If the anchor text is unique enough, then even a few pages linking with that keyword will make sure the page comes up high, while for more common-place keywords, you need a lot more links.
- Shu Wang
