For seo practitioners, the outer chain is as familiar as ever and must be approached daily. So, what are the forms of the outer chain? What are the different chains
1 interlocking text external chain
It's the highest external chain of weight, and if it's a hair chain, it's the best one. The link between the text and the web site is a combination of anchor text, such as the seo training
2. Text + text links
This link weight is second only to the anchor text link, e. G. Seo basic course http://seo. Aizhan. Com/. It should be noted that the essence of such links is that they are explained in writing around the site, making them more relevant。
3. Web site hyperlinks
The weight of this connection is similar to that of the second, which is only a link to the web site, but there is no textual explanation, such as http://seo. Aizhan. Com/term/124. HTML, which is not very relevant。
4. Plain text links
Such link weights are very small and try not to make such links, for example: http://seo. Aizhan. Com/。
5. Photo links
Photo links are unusual and try not to make such links. The search engine doesn't know pictures, it can only be identified by the alt properties of the images, and the weight that the link can convey is very small, and it's not working, and the web site you leave the link will just seal your number。
The external chain forms are currently divided into more than one, and each seoer chooses the corresponding external chain forms according to his or her actual situation。
A post on "extralink construction":
