Team of Google Algo works on clear guidance to ensure that the quality site should come on top results. To ensure the quality of results, google algo theme do best to filter out the spam sites to get the best site on top. Some of the basic element that are considered are
1. The site should be well made and functional
2. The site is being marketed widely
3. Some of the authenticate site should have those site links
4. Others
There are many Black SEO Hat practice that do skip through the Google Algo but ultimately they cant survive more
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