SEO SEOER, in talking with customers should be undertaken to ensure it does not reach the first position after several optimization (ie, should not guarantee rankings) because the search engine algorithms constantly updated and can not guarantee the site's ranking, each search engine updated website ranking are likely to be a big decline or even disappear. As SOER should be more emphasis on the overall optimization of the website is to give our customers the performance results within a certain time, rather than emphasizing a particular keyword rankings. Website optimization can not guarantee the site's ranking, there are three basic reasons: 1, the search engine algorithms constantly updated, this is a fundamental reason is not guaranteed website ranking. To google, for example, the search engine algorithm updates every three months or so, after each algorithm update the site more or less have some impact, website ranking position in general will change, there is a part to improve website ranking, but From a practical observation that most of the site's ranking is declining, which is due to the position of competitors continue to optimize the front, with website optimization maintenance is not in place, so the algorithm is updated each time, at the above website google website ranking appears most decline to varying degrees. google search engine algorithm update, not only for personal websites, corporate websites have an impact on large sites there are now a relatively large impact. Studies have shown that: In the most recent algorithm update google, traffic large sites also have a huge impact, the most serious traffic loss of 24%. Seen on large sites are generated after each update such a big impact on personal websites and corporate websites, the impact should be larger, so do website optimization is not guaranteed to be ranked as fundamental guarantee SEOER not. www.xinsiwei.net.cn 2, constantly optimize the competitor's website. Position in the search engine home page is limited, ranking second after page, the more rearward effect is more obvious, so everyone grab a page of a search engine positions. If the 10 competitors have a website, then your website ranking can not be guaranteed because of the possibility of your competitor's sites accounted for 10 of the previous 10 google Home location, you can only be a second page. To clear your website optimization, while your competition is also likely to do site optimization, site optimization never done site will likely compete with you, so from this point of view, this is not guarantee rankings! In fact, really is true, with more competition, more and more competitors website will be optimized in order to reduce marketing costs artificially subjective (in fact may not be able to reduce the cost of website promotion). 3, site optimization and maintenance. If your site maintenance updates are not in place, then your site will appear ranking dropped after google update, and sometimes there will be a substantial decline in ranking. Website Optimization maintenance in place, it is possible to make your website ranking rise. SEOER must remember that you are doing site optimization, site optimization during the same competitors, to ensure the protection or promotion website ranking ranking, then you'll have to do better than competitors. Once a competitor's website optimize maintenance than you optimize maintenance in place, your website ranking will decline. Each SEOer expect to improve website ranking, so they will work hard to carry out website optimization of maintenance, which will be a lot of variables, so from this point of view is no way to guarantee rankings. In these three can not guarantee that the basic reason for the site's ranking in front of the first factor is the objective, SEOER simply ensures that the. The latter two factors are subjective, want to improve website ranking, then the basic points from two reasons to be optimized. Website optimization has always been continuous optimization of the website, rather than optimizing a certain stage.