The Free On-line Dictionary of Computing (30 December 2018):
(Or "hyperlink", "button", formerly "span",
"region", "extent") A pointer from within the content of one
hypertextnode (e.g. a web page) to another node. In
HTML (the language used to write web pages), the source and
destination of a link are known as "anchors". A source
anchor may be a word, phrase, image or the whole node. A
destination anchor may be a whole node or some position within
A hypertext browser displays source anchors in some
distinctive way. When the user activates the link (e.g. by
clicking on it with the mouse), the browser displays the
destination anchor to which the link refers. Anchors should
be recognisable at all times, not, for example, only when the
mouse is over them. Originally links were always underlined
but the modern preference is to use bold text.
In HTML, anchors are created with .. anchor
elements. The opening "a" tag of a source anchor has an
"href" (hypertext reference) attribute giving the
destination in the form of a URL - usually a whole "page".
Free On-line Dictionary of Computing
Destination anchors can be used in HTML to name a position
within a page using a "name" attribute. E.g.
The name or "fragment identifier" is appended to the URL of
the page after a "#":