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Submit to High PR Sites - PR stands for Google Page Rank, a system for ranking a websites visibility within Google. A higher PR website gets visited more often from the Google spiders, so links from sites with higher PR will have a bigger impact on your search engine exposure. There are plenty of free article directories with PR 5 and PR 6. These offer the most value, but you will also find it useful to submit to a number of PR 4 and PR 3 sites as well. Find the best article submission sites at directorycritic.com.