Google's Link Detection Algorithm
Search engines use a link detection algorithm to determine the usefulness of a website. Your website's ranking in Google search results is partly based on an analysis of the websites that link to it. Read more about this link based analysis here at easybuylinks.com. Link-based analysis is an extremely useful way of measuring a site's value; it is based on the principle that the higher the number of incoming links, the more useful is the website to users. And thus search engines rank such sites higher in search engine result pages.
However, some SEOs and webmasters attempt to manipulate search engine results, by creating "link farms", where they buy and sell links that have good PageRank, disregarding the quality of the links. Such buying or selling is in violation of Google's quality guidelines and can negatively impact a site's ranking in search results.
However, not all paid links violate Google's guidelines. But buying and selling links for the purpose of manipulation of search results is what is not commensurate with search engine guidelines. Google works hard to ensure that it provides the user with the most relevant results and is thus constantly improving its algorithm for detection of such links.
A Tip to Pass Search Engine's Link Juice Test
While buying links be careful about the number of links that exist on the page. Make sure to buy links from the websites that do not sell links en masse. Your page should look natural. Recent research has shown that most of the link broker and publishers don't pass the "Link Juice Test". So in order to pass the link juice test here's what you need to do:
Say you have a site that sells recipe books - do a search on "Recipe books" (with quotes), go down the list of results and start asking webmasters with "recipe books" in their content if they would change the words "recipe books" to a link to your site.
Get few of these and you will increase your search engine ranking for recipe books a lot faster and cheaper then spending huge amount per month buying links. Thus saving your money and also getting good results and passing the link juice test.
To conclude purchase links in the content of great websites related to your site that don't look like they sell links.
