Too much external links will have a negative impact

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Foreign SEO recently discussed this topic. is the link too much will give the site's search performance adversely affect it?
In fact this was a year ago, I began to think about this problem. There is no deeper understanding behind it.

I remember probably more than a year ago, Google punishment seoinc.com for the representative of several well-known SEO site. At that time, many people think that there is a large number of seoinc purchase text link advertising results, and some people began to ask, is not the number of external links more than normal time will be punished. At that time with Google query seoinc.com external links, the number of more than 30,000, including hundreds of thousands of pages, this data with a lot of portals close.

In fact, this is logically also very easy to understand. For example, one of your personal site visits in general, but the number of external connections to the tens of thousands, far more than the normal situation, which is most likely to indicate that the site artificially create a lot of links. and the search engine algorithm as long as the setting of an external link with the Site page or content of the highest proportion, over this proportion to carry out a certain punishment. , it is not difficult to achieve from the technology.

From the sandbox situation to understand, quickly adding links or reducing links may lead to entry into the black box. It is also a good way to delete or drop to sandbox when the link accumulates more than a certain amount of time. And if it really matches this guess, then it can explain another reason, SEO is a balanced art. Everything is too overkill!