!There is a dead link or black chain
1 update sometimes more, sometimes less
2 the number of the chain quality is not a stable
many webmaster in site is updated because no concept of time or no specific daily work arrangement, resulting in website content update time every day is not the same, do not underestimate this point, this is a problem can lead to the above mentioned ranking and down. For a spider crawling are updated every day to love a regular website. In addition to update content as today, tomorrow is less, updated every day a number is too large may also lead to ranking up and down. So how are we going to solve this problem, is very simple, as long as we arrange a good time every day, what time to update the content, every day update how many content on it.