The risk and avoidance of blog links

The latest Google PageRank update, a lot of the PR of the blog has been lowered, and the PR of the portal site is generally elevated, MII record site PR rose to 10, whether this change indicates that Google is reducing the weight of the blog site is still a question, But I noticed that a lot of content is very good blog has been down the right is really puzzling, I am here to analyze the portal does not have the blog and the unique "friendship link" the risk of existence and circumvention methods.

Link is a blog site between the promotion of a way, usually by the blog site and personal sites have a certain personalized, and the portal site usually no links. If the blog's program, content, etc. have not changed, the possible reason for the downgrade by Google is the link on the home page, obviously, linked to some cheating or spam sites will be downgraded by Google, in addition, the exchange of links there are several possible risks, need special attention.

　　The weight of the linked site

Exchange links should pay attention to the weight of each other's site, see its PageRank value, if and PR value is too low blog or by the Search engine penalty blog Exchange links, there is the risk of the search engine joint punishment.

　　Number of linked Sites

The number of links should not be too many, the number of control within 50, too many linked search engines will not be indexed, but also bring negative impact on the site, if more than 50 links, you should add nofollow properties or use JavaScript form, Otherwise, it is easy to be degraded or punished by search engine as link factory.

　　Link-Address dependencies

Should add the same type of blog links, blog content should have relevance, if the content does not have relevance, it is often found by the search engine is cheating.

　　Link to the sales link for the site

Even if the above conditions are met, there is a risk of exchange links, that is, sales links. Because most bloggers have the demand for profit, some bloggers will join some of the advertising alliance to sell links, join such an ad league will often be Google search engine penalty, PageRank will even be clear zero, if and this kind of blog exchange links, it may be the search engine that is the same advertising alliance and joint punishment. These risks are manageable, and the risk is not controllable, as often the blogs that sell links are fairly common and covert.

The last point is that I think the more critical point, Google by punishing the sales link of the site to achieve the fairness of the search results, but the blog is not like a portal, most bloggers need to profit and revenue to maintain the normal operation of the site, for low traffic Gao Quan value of the blog, Sales link revenue will be much higher than AdSense, if the sales link this profit path is blocked, for less traffic blog sites, to achieve the profit of the blog becomes more difficult.