1, the construction of the external links generally has two functions: to speed up the collection, improve the page ranking, so when you exchange links, you must first determine the main role. In order to speed up if it is included, then you should find some snapshot updates frequently site exchange links, if you want to increase the page ranking, you may need to exchange Links with some web sites with higher PR value.
2, Links difficult to scale, with the maximum number of
for a new website, if you want to rely on Links exchange to increase weight, may be more difficult, because under normal circumstances, you can follow some of the new on-line site exchange links, or with some of the weight is not high site exchange links, weight lifting is limited, so the new online website, best can through other ways to get some links, such as to allow customers to give some links, etc. their weights up after Links exchange.