Common code formats:
① [URL = "http://URL link/"] Keywords [/url]
②& lt； A href = "http://URL link/ "> keywords
In the eyes of some SEO beginners, this seems difficult to understand, but it is actually very simple. It not only provides a crawling path for spiders, but also ranks keywords.
It is an important algorithm in seo optimization. Speaking of this description, we have to mention a hyperlink analysis patent named "Hyperlink Document Retrieval System and Method" by Baidu founder Li Yanhong. From this patent, we can clearly understand that this patent aims to solve the correlation between web pages and search keywords, and description links play a great role in it.
The following is the understanding of its patent: when a file is indexed into the database, it will be recorded together with the hyperlinks pointing to the file and the anchor text (link text) used in each hyperlink. Search words will also build a database, and each word will be recorded together with the hyperlinks containing the word and the files pointed to by these hyperlinks. When searching for a keyword, the files or web pages with the largest number of reverse links with the keyword as the link text will be arranged as the most relevant results.
Li Yanhong believes that hyperlinks are references to pages, and a worthless page cannot be actively hyperlinked by many websites. Hyperlink is how others evaluate you, and the description on hyperlink is how others evaluate you. So in order to rank keywords well, the function of keyword anchor text can be imagined. Of course, the algorithm of search engine is much more complicated than the actual algorithm.