Backlinks are very important to get high rankings on Google. That's why Google works so hard on filtering the wrong kind of links.
The links that point to your website should be from related websites and they should contain the keywords for which you want to get high rankings. Do not manipulate the links to your website by buying links and do not join automated link systems to increase the number of links to your website.
If you want lasting results, focus on ethical search engine optimization methods. There are many ways to get good links (related websites, blogs, social bookmark sites, directories, etc.)
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