PR-Hike.com is an online php directory that was created for the purpose of listing quality websites to provide more exposure to sites in order for them to gain more of a dominant presence online to the millions of web users worldwide. Link submission to this directory is one step at building your PR or PageRank and exposure on some of the top search engines that are on the World Wide Web including Yahoo, Google, Bing, DogPile, and more. Link building is hard work and it is up to the site owner to make sure that everything is being done to get quality backlinks and making sure that their link is being placed on relevant pages or pages that have other links and text content that is the same or simular to their website's content. Relevancy is important to improving rank on search engines combined with numbers. Relevant backlinks equals quality backlinks and irrelavant backlinks equals spam and search engines take all that into consideration when sites are ranked every period. The goal is quality links plus trying to get as many as possible to compete with competitors. Make sure sites and individual pages with your link on it are indexed by the major search engines so you know they count and the higher the page rank of the page your link is on the better for that site as long as it is relevant as well. If your site is listed on a non indexed page on another site you can always submit that other site's url of that page to the desired search engines of your choice so it can be crawled. Also, when purchasing backlinks or link exchanging, make sure that the page that your link is on does not use the nofollow attribute because your link will not count regardless if the page is indexed or not. Directory submission is a great way to build relevant links because directories have categories. Blogging and articles are also a great way to linkbuild and gain exposure.