time is also a factor of
link depth should also pay attention to
link depth usually we will ignore, one aspect is always misunderstood. When we do links, generally do a home page, or the page classification, but few people do two level classification and content the article page, if our site is high quality content, so not only the home page with links to pages, should also have external links, but this is particularly evident in the mall site, when when we saw the same products, will make the URL and send them to friends, for this website, the product is their content, if we usually have high quality content of this website, it will certainly attract not less active users do external links.
is difficult to link high value
this is not absolute, but in general, get links difficult is often the highest value. Here the paid links are excluded, the free links, appear in the text of the link is the highest value, but you need to have a high quality of the site content or link bait can be achieved. In peacetime do link building work, not up on the requirements of webmaster give you a link, often go to the wall, so the time will be longer, but it must have the value of such links. Sometimes, if you must fully understand each other, you will take the initiative on the basis of one-way links to you.