Second, recommend links: there is no certain correlation between links and linked web pages. For example, Shenzhen SEO training website will give a recommended link to some websites that are often used online.
3. Citation link: The cited webpage refers to the content of the cited webpage. In academic websites, citation links are similar to traditional literature citation links. The difference is that the linked resources may be academic literature, but they may also be multimedia files such as sound and video, or the email address and personal homepage of the cited person. Although the citation forms have changed, most of them are affirmation of the quality of the cited web pages. Obviously, a man with a lot of money? Reference link? Web pages or websites are usually of high quality.
Fourth, advertising links: links aimed at commercial interests are directly regarded as links with no reference value by search engines. However, it is difficult for search engines to identify such links, so the SEO industry has bred link trading services.
Fifth, service links: links provided by websites for service purposes. This connection does not involve transactions. Service links reflect the service capabilities of a website. A website's services are heavily linked, which is also an affirmation of its website services, and it also has certain evaluation value in the view of search engines.
Sixth, expand links: In order to provide users with more extensive information, webmasters usually set up some related reference links. For example, Shenzhen SEO training website will recommend some content to everyone online, so that everyone can expand their SEO knowledge.
Seventh, relational links: links between links and linked web pages. This type of link is not necessarily related in content, but usually it exists to reflect a certain relationship in reality. For example, when some websites go online, well-known websites point to it.
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