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See a very good article, is from Zac "SEO practice password." Feel good take out to share with you. If there are infringing places, contact me to delete. Let me start by saying this article. When we look at the keyword rankings, we notice that there is no direct correspondence between the rankings and the absolute number of external links. Many pages with fewer external links are ranked above a page with many external links. This is also a lot of SEO novice confusion, why their own page outside a lot of links, ranking is not as good as only a few links to competitors? This has a lot to do with the quality of external links, and the following is a good discussion of what the external links should be.
1. Click Flow
Although from the SEO point of view, external links are the most direct means to improve the ranking, but the click of traffic is the original meaning of the link. If you can get a link from a large web site, even if the link has nofollow or turn, can not directly improve the ranking, as long as you can get the click of traffic, is a good external links, after all, the purpose of SEO or get traffic. By linking directly to the flow, is actually less around a bend.
In this sense, the site Alexa rankings can also be quick to determine the quality of the link one of the signs (as long as the Alexa rankings are not by cheating), because Alexa rankings can be a rough reflection of the level of traffic. Some links can bring in hundreds of thousands of or even tens of thousands of clicks per day.
2. One-way link
The best external link is the other Side webmaster initiative to give one-way links, do not need to link back, two of sites linked to each other, such as friendship links, weight than one-way link is much lower. Of course, one-way links are much more difficult to obtain than exchange. Because of the rare, the value is higher.
3. Spontaneous and editorial
Good links are the other owners volunteered voluntarily, and often is the webmaster's editorial behavior, that is, in the article small mention a concept, think your page is the best, most authoritative, so link to your page. This link to editorial significance is the real vote.
4. Content Relevance
Content dependencies are important when looking for sources of external links. A group of SEO personnel said that a page is about weight loss law, not necessarily credible; a group of fitness coaches say that a page is about weight loss methods that can be trusted and the voting power is stronger.
Content-related degrees apply to both the entire site level and the page level. Site theme is of course the best, sometimes a page does not necessarily coincide with the whole site, the theme of the page itself is linked to the page, but also more than the link weight of irrelevant pages. The content correlation judgment does not have the clear boundary, only relies on the outside chain construction personnel's common sense and the intuition. We don't know exactly which ones are most relevant to weight loss, but at least we know these topics are more relevant than financial stocks and weight loss.
5. Anchor text
Anchor text appears in the target keyword is the best external links in the search engine ranking algorithm has a large proportion. But anchor text cannot be overly centralized. A website to get the external links are all using an anchor text, is usually the first page of the most important target keyword, is often caused by one of the reasons for punishment, because too unnatural, deliberately optimized traces too obvious.
So when possible, links from important pages try to use the target keyword to do anchor text. The weight of the page is not too high, the appropriate mix of various anchor text. Spontaneous links usually anchor text, you can not control the other webmaster use what link text, fundamentally avoid the problem of excessive concentration of anchor text.
6. Link Location
Footer, the left or right side of the navigation in the Advertising section, the special set of link pages are the most common trading links and exchange links location. Search engine through the page block, you can identify the links to these locations, reduce their voting weights. The best external links are present in the body, because only in the body is the most likely spontaneous link with editorial significance.
7. Domain name weight and rank
issued a link to the domain name registration time, the PR value and the first home target keyword ranking, all directly affect the effect of the link. To find the source of the link, it is best to search the other side of the site target keywords (usually in the title of the home page is reflected), but also to search the other side of the site or company name, to see where the rankings. The better the rankings, the higher the weight of the site. Search for each other's target keyword does not necessarily require ranking in the first ten or two bu on the external link to obtain, ranked in the first more than 10 pages have a certain weight and ranking ability, is a good source of links.
8, page weight and ranking
In addition to the overall weight and ranking of the site, the issue of the link page weight and ranking ability is also a place to pay attention to. In addition to the use of home exchange links, from other sites to get links from the homepage is very difficult, from the inside page to get links is much easier.
Sometimes, the link from the inner page is not necessarily more than the effect of the first page link. Many pages inside the page itself has a large number of external links, the weight of the page is also very high. You can use the SEOmoz POG Station the strongest page tool to check a domain name on what the internal page weight is also good, to get the first page link difficult, you may wish to try the initiative request from the high weight of the inner page to get links.
9. Export the number of links
The more export links are on the page, the less weight each link can be divided. Many of the pages devoted to friendship and links exchange have no other substance, all of which are export links, possibly as many as dozens of hundred. Getting links from such a page is bad. The content of the blog posts, news pages, etc., usually exported a lot less links.
10. Page updates and snapshots
If the page's snapshot in search results is very new, this page is often crawled by search engine spiders. Such a page does not weigh, voting power is relatively high, also means that the added links can be detected quickly, add ranking algorithm. If the page snapshot is a few months ago, it may take several months to get the link.
11. Overall health of the website
Homepage PR value? are the main categories of pages to get the corresponding lower than the first level of the PR value? Is it open catalogue, Yahoo etc included? site size? The main keywords and long tail keyword ranking situation? Is there any sign of being punished?
12. From Good Neighbors
Looking for external links, only the formal site, do not consider spam sites, pornography and other illegal content sites. Web site by Search engine deletion or serious punishment can not be considered. Especially in the exchange of links, this kind of site should be excluded, because the link to this site, the site must have a negative impact.
Even if there is no exchange, the other side of the site one-way link to take over, there will be no good results. If such a chain takes over, it may be the search engine that your site with these problematic sites for the neighborhood, leading to punishment.
1 3, from edu,gov and other domain names
Most SEO think, from edu,gov this can not casually registered domain name link effect best. Google engineers have repeatedly denied this, and their official claim is that these domains are not inherently more weighted than other domain names.
The reality is that there is usually less spam on the edu,gov domain. Because of their relationships with other governments, teaching and research institutions, these sites have a much higher chance of obtaining high-quality external links themselves than commercial websites. So even if edu,gov domain name does not have the innate advantage, but often has the cumulative quality superiority, they give the link effect generally also better.
Although, the above discussion is the best situation. If these conditions are able to get high score, such external links can be said to be met and cannot be asked. Do external link construction can not adhere to such high requirements, only as close as possible to themselves. This article from Zac "SEO practice password"! Welcome interested friends to buy this book to see
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