Question: Does the reverse link really make sense?

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The following diagram shows the results of the reverse chain in the March 25, 09 query:

Baidu, Google, Yahoo, these three backlinks are very different number, this is back to the original definition of the problem, what is the reverse link, if the reverse link does not occupy a certain weight, I am really lazy to think of it, the whole is a blind toss, someone else has my link address, why not as a reverse link? This data estimates only the webmaster to see, When the webmaster saw that Google's reverse chain number is 0, so that the feedback to the data will be valuable? If the internal secrets are not disclosed, why do you also publish the search engine "link:www.pizhou.us" can query the reverse link? Now that you have Link's query function, you should make the query more accurate. If the number of backlinks is only to evaluate the weight of a website, the user's preference for the site, pull eggs, links only webmaster can link, the number of links can only reflect the friendly relationship between the webmaster, and the user's preference, is not more should be from the collection folder to statistics?

In response to the above I think of Google's PR value, the official explanation is: "PageRank technology will be from page A to point to page B of the link to be interpreted as a pair of page B by a vote." In this way, PageRank evaluates the page's importance based on the number of votes received by Page B. "I think this assessment of the importance of a site, the starting point is not wrong, the importance of the site first is who to evaluate, each webmaster?" Should it be from the user's point of view? Did the user cast a vote like this?

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