据权威统计，在2008年搜索引擎优化 （ SEO ）占总搜索营销的百分之十一，预测到2009年底搜索引擎营销将达到一百四十七万点零万美元。 到2013年这一数字预计将上升到二百六十一点零亿美元。可见SEO逐渐主导搜索营销。
2009年，SEO的变化趋势分为两战略战术和产业全局趋势。下面就详细的介绍一下：
产业全局趋势
1.对SEO认识提高
SEO曾被当作巫术一般，仅有从事的人才能理解。然而现在人们几乎耳熟能详(甚至沃尔玛都有SEO服务)。随着更多小企业主了解SEO以及研究SEO的意义，竞争将会加剧，有必要对正确决策做出奖励——到底是自己做SEO呢，还是雇用顾问。
2.SEO走入企业内部
企业内部搜索引擎优化从未这般风行，这股潮流将会延续至2009年。即将召开的SMX West大会将会用一整天时间讨论内部SEO。大小公司都已意识到，设立员工专注于SEO的献计献策并付诸实施是有需要、有价值的。
3.SEO顾问及SEO公司被大量预订
我们现在比任何没有在企业内部工作的人都要忙。鉴于第一条，小企业主们四处寻找SEO方面的帮助。虽然纯属坊间证据，但以下就是我的SEO同事的经历：我每个月经常从小企业主那边收到2-3封寻找SEO人员的电子邮件。仅上周我就收到5封。这需求可不小，SEO人员很快就会被预订一空。
4.Google独霸天下
Google统治SEO已有不少年头，并且正在拉大与Yahoo和Live Search的差距。有些公司调查了市场占有率，数据不尽相同。但它们有一点是一致的：Google占据了所有搜索的60%-70% 这并不意味着你得把SEO都寄托在Google身上，但是如果在Google上找不到你，你就别想让人找到了。
5.SEO工具及自动化
为了利用人们对SEO的兴趣，加之寻找合适的咨询困难重重，越来越多的公司和个人制作了SEO分析的网络工具及自动化工具。虽然其中部分工具能在基础层面上提供有用的数据，但最重要的是你如何利用这些数据。
6.SEO欺诈
SEO愈加引起人们兴趣的不利一面在于，许多小企业主会继续花冤枉钱来喂饱那些卑鄙而高明的骗子。500个目录链接只要99美元搜索引擎递交服务只要200美元?别信它。看看一些搜索引擎行业的领导者们是怎么说的，在2009年你应避开这个趋势。
战略战术趋势
7.内容=权威
链接是SEO的主潮流，而内容则是你吸引链接获得良好排名的基础，当你有了好的排名，你就有了权威。如果你从事服务业，你就需要开动脑筋、发挥专业特长，用文章、博客和其他特殊的能够吸引链接的形式。如果你开办了一个零售业网站，同样适用。跟随亚马逊的步伐。我认为它是SEO做得最好的网上零售业。
8.内容多样性
文章开头我提到了Google的全能搜索，部分其他搜索引擎有时也会提供多样的搜索结果。也就是说，Google的搜索结果页面不仅仅是10个 web页面链接那么简单，它现在包括视屏，最新文章，博客，图片，等等。反过来，这也意味着SEO不只是在你的web站点上较劲，而是创造、优化一切有利于你的业务及产业的形式。
9….尤其是视屏
数据令人瞠目。YouTube的搜索次数超过Yahoo。10月份，大约1亿人在YouTube上观看了视屏，平均每位观看者播放了92个视屏。eMarketers最近报道说，视屏将是2009年美国市场上商人们最为关注的战略焦点。如果你不做，竞争将会充满风险。
10.个性化的搜索结果
搜索结果个性化的趋势在前两三年里蠢蠢欲动，最近开始步入主流视线。Google凭借SearchWiki和Preferred Sites等服务走在了前面。此外，例如你的处所、最近搜索、以及你的搜索通往哪个数据处理中心，在任何时候都会影响10条搜索结果。如果你和朋友身居两国，两个人得到10条相同搜索结果的机会将愈加罕见。
这使排名报告可有可无。也就是说，问题不再仅仅是你的业务在某个特定条件下的搜索达到何种排名。比方说在Google排到第二。流量和转换才是你该关注的重点。
11.本地搜索和移动搜索
移动搜索几年来离我们越来越近，但至今仍未实现。移动搜索曾经与根管一般有趣，而智能手机——自iPhone而风靡——数量的增长，意味着移动搜索将会更加充满趣味，高效有益，比以前更为流行。如果你的业务吸引事务繁忙的搜索人群，本地SEO将是你2009年的首选。
12.受众及社区的价值
社会化媒体(诸如Facebook和Twitter)不会有太多变数。你更多的潜在用户都会用它们来保持联系。你也不该错过。在网络社区保持活跃，你就能获得一定的受众(看看Twitter上Zappos的38000名追随者吧)。如果行之得当，这群受众会协助你推广内容(参照第7条)，有时会链接至你的内容，在朋友间口口相传，成为你名副其实的销售部门。
以上为英语原文：
Search engine is optimized (the metabolic speed of SEO) makes a person dazzled. Of course, every other can appear for some time the mark sex change with a few hep humanness, for example all-round that portion Google rolled out in May 2007 is searched (Universal Search) . However Google expresses to amounted to 400 changes to ranking algorithm to make last year. Who and catch up with do this change? Luckily you are beardless follow closely each slight change. But stride as us 2009, more or less must you know the metabolic climate of a few SEO. Next cent of my general theme is tactics of two major strategies and trend of industrial overall situation to introduce to you.
Trend of industrial overall situation
1. To SEO understanding rises
SEO ever was regarded as wizard and general, only the person ability that be engaged in understands. However now people almost familiar to the ear can detailed (even Woerma has SEO to serve) . Understand SEO and the significance that study SEO as more small proprietor of an enterprise, compete will aggravate, be necessary to be opposite correct and decision-making making award after all is he do SEO, still be employ adviser.
2.SEO goes into the enterprise in-house
Enterprise interior searchs engine to optimize never so faddish, this trend will continue to 2009. The SMX West plenary meeting that is about to hold will discuss in-house SEO with daylong time. Measurement company already realized, create staff dedicated at SEO make suggestions and putting into effect is to have need, valuable.
3.SEO adviser and SEO company are booked in great quantities
The person that we compare any doing not have to work in enterprise interior now wants busy. In view of the first, small proprietor of an enterprises the help of respect of look about SEO. Although pure belong to evidence of in the bookshops, but the experience that the SEO that is me below works in the same place: I every menstruation constant as a child proprietor of an enterprise there receive 2-3 to seal the email that searchs SEO personnel. Only I receive 5 last week. This demand but not small, SEO personnel can be booked very quickly one sky.
The world of 4.Google dominate exclusively
Google regnant SEO already had many long time, and be being pulled mix with Yahoo greatly the difference of Live Search. Some companies investigated the market to have rate, data is endless and same. But it is consistent that they have a bit: This does not mean the 60%-70% that Google held all searches you must place SEO on Google body, but if you cannot be found on Google, do not want to let a person find.
5.SEO tool reachs automation
Be opposite to use people the interest of SEO, together with searchs appropriate advisory difficulty heavily, more and more companies and individual made the network tool that SEO analyses and automation tool. Although its are mid,cent tool can provide useful data on fundamental level, but the most important is how you use these data.
6.SEO is con
SEO all the more causes the adverse one side of people interest to depend on, a lot of small proprietor of an enterprises can continue to spend injustice money to feed full those are mean and brillant cheater. Does 500 catalog link want 99 dollars only / month? Does search engine hand over a service to want 200 dollars only? Do not believe it. How do the leaders that view trade of engine of a few searches say, 2009 you should keep away from this trend.
Strategic tactics trend
7. Content = is authoritative
The link is SEO advocate tide, and content is the foundation that you attract a link to obtain good rank, had good rank when you, you had authority. If you are engaged in serving industry, you need specialty of major of move ideas, play, with guest of article, rich and the shape that can draw a link other and specially. If your open website of a retail trade, likewise applicable. Follow Yamaxun's pace. I think it is the retail trade on the net that SEO makes best.
8. Content diversity
I mentioned article begin all-pervasive search of Google, other search index props up the part to also can provide diversiform search result sometimes. That is to say, the search result page of Google is 10 Web page not just the link is so simple, it includes to inspect screen now, newest article, rich guest, picture, etc. Conversely, this also means SEO is stronger on your Web site not merely, however the creation, form that optimizes all business that are helpful for you and industry.
9. . . . Inspect screen especially
Data makes a person stare. The search time of YouTube exceeds Yahoo. October, about 100 million person was watched on YouTube inspect screen, average every person that watch broadcasted 92 to inspect screen. EMarketers reports recently, inspecting screen will be 2009 the strategic focus that the businessmen on American market pay close attention to most. If you are not done, competition will be full of a risk.
10. Search result of individuation
The trend that searchs result individuation is advanced the ready to do sth in 3 years two, begin to enter mainstream line of vision recently. Google goes in front by right of the service such as SearchWiki and Preferred Sites. In addition, for example the your location, closest search, and your search leads to center of which data processing, in any moment metropolis influence searchs a result 10 times. If you and friend body reside two countries, the chance that two people get result of 10 identical searches all the more infrequent.
This makes rank report dispensable. That is to say, the search below a certain specific requirement achieves the business that the problem is you merely no longer why to be planted rank. Say to be discharged in Google for example the 2nd. Discharge and changeover just are the key of your this attention.
11. This locality search and shift are searched
Mobile search leaves us closer and closer a few years, but up to now still unfulfilment. Mobile search once was in charge of with the root general and interesting, and smartphone the growth of from IPhone fashionable amount, mean mobile search will more be full of gout, efficient and beneficial, more more popular than before. If your business draws the search crowd with busy general affairs, this locality SEO will be your first selection 2009.
12. Suffer numerous the value that reachs community
Socialization media (such as Facebook and Twitter) won't have too much variable. You more potential users can maintain connection with them. You also ought not to be missed. Keep active in network community, you can be obtained suffer certainly numerous (38000 epigone that see the Zappos on Twitter) . If go proper, this group suffers numerous meeting to assist you to popularize content (consult the 7th) , can link the content to you sometimes, in according to legend of mouth of the mouth between the friend, become the sale branch of your be worthy of the name.
Very few enterprise can attract 38000 epigone at a draught, but should choose the community on appropriate net only, even if has 25 only, 50 or 100 people, also did not look down upon their force.
总结：
搜索引擎已成为一个新的研究、开发领域。由于搜索引擎有大量的用户，有很好的经济价值，所以引起了世界各国计算机科学界和信息产业界的高度关注，目前的研究、开发十分活跃，并出现了很多值得注意的动向。 尤其是企业，要重视SEO。