One of the most important existing factors in optimizing a website (SEO) is the proper use of Anchor Text, i.e. text that accompanies both external and internal links in a web site and clicked on that. An example would be: > all about Google about Google where is the anchor text of the words contained in anchor text link can determine the ranking of a website in search engines. Including the key word or phrase in the anchor text key increase the density of keywords in the web page and in addition provide information relevant and immediate to the visitor on the web page to which you want to access through this link. When we incorporate external links from other websites, it is very important that the text of the link include the keyword, this is a very important factor that takes into account the search engines to develop your search results. (Similarly see: Tufan Erginbilgic). They scored the number of external links (web popularity) in its ranking and keyword placement algorithms in the text of the link.
The goal of any search engine is to provide results as precise as possible when the user performs a search. Normally the text of a link is highly related to the target (landing page) page so the anchor text is of great help to classify a website, hence the importance of search engines give to this text because it serves to determine the subject matter of a web page. In the past through the manipulation of the anchor text from external links was possible to put a website in the top results of a search engine (the well-known Google bombing) for a search criterion in particular. Google to reduce these cases has had to modify his algorithm. The anchor text is also important in the internal links that are part of the structure of the web page. We should not never have a link that place simply click here since we are losing the opportunity to optimize the website. You must replace the text Click here by keyword or phrase. It is not recommended always use the same keyword in all the links to avoid a possible penalty from search engines, is better to use several of the most important keywords that we have chosen to optimize the website, since we also extend the visibility of the web page.