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I agree with Gaston, that setting your goal on a DA target is not the best approach. I set my goals by deciding what content should be on my website to make it an outstanding resource to my potential clients  (for a site that sells products or services) or my potential audience (for an informational site).   What content would you need for your site to serve the needs of the visitors you desire to attract? You can make a very ambitious content list that might take years to produce, or you can take it in stages - by topic.   All of my sites were started over ten years ago.  One achieved its content goal in two years.  The others have a content goal for which the goal posts have been moved outwards every few years.  I don't think about DA.  I think about the next article to write.