Factors that affect directory placement are correct category selection for the Web site you are submitting and good site descriptions. You will undoubtedly be surprised to learn what keywords your audience enters when searching for your site. A majority of an specialist's time should be spent on researching the keywords your target audience is most likely to use when conducting a search and incorporating these words and phrases into your Web pages. The most important tags are HTML title tags and the main body text. No one should guarantee a search engine ranking.
Search engines regularly change their algorithms.
What works one day might not work the next day. Search engines want to differentiate their results from one another. They want fresh results from their latest site-indexing efforts and to flush their database of spam sites whenever possible. So they tweak algorithms. Guarantees either have no substance or infer aggressive techniques that could get your site banned from being indexed in search engines and directories.