Link text refers to the words used in a hyperlink to point to information either internally within the same web page or website or externally to another web page on an external site.
Unfortunately, many links are unidentified to the search engines because they simply read “click here.” With comprehensive search engine optimization all hyperlinks are optimized to clarify to both the search engine and the end-user exactly what information is found at the other end of that link.
Strategically naming links, also known as hyperlinks, supports overall search engine optimization efforts to increase your web page relevancy score and achieve high rankings by implementing the keywords and phrases used to optimize the web page and to identify the content it points to.