SEM是Search Engine Marketing的縮寫，中文意思是搜索引擎營銷。SEM是一種新的網絡營銷形式。SEM所做的就是全面而有效的利用搜索引擎來進行網絡營銷和推廣。SEM追求最高的性價比，以最小的投入，獲最大的來自搜索引擎的訪問量，并產生商業價值。
　　SEM可以在搜索引擎中進行品牌的維護，將品牌的負面信息盡可能少的呈現在搜索用戶面前，可以預防競爭對手在網絡上惡意的誣陷。同時可以在進行正面和商業信息的推廣，進而達到品牌推廣的目標！

Search Engine Marketing SEM is the abbreviation of the Chinese search engine marketing means. SEM is a new form of online marketing. SEM did was comprehensive and effective use of search engines to conduct online marketing and promotion. SEM to achieve the highest cost, with minimal input by the largest traffic from search engines and generate business value.
SEM search engine in the maintenance of the brand, the brand of negative information as little as possible before the presentation of the search user, you can prevent competitors in the network, malicious framed. During the same time can promote a positive and business information, thereby to achieve branding goals!
　　SEM的服務主要有4種方式：
　　一、 競價排名，顧名思義就是網站付費后才能被搜索引擎收錄并靠前排名，付費越高者排名越靠前；競價排名服務，是由客戶為自己的網頁購買關鍵字排名，按點擊計費的一種服務?？蛻艨梢酝ㄟ^調整每次點擊付費價格，控制自己在特定關鍵字搜索結果中的排名；并可以通過設定不同的關鍵詞捕捉到不同類型的的目標訪問者。
　　而在國內最流行的點擊付費搜索引擎有百度，雅虎和Google。值得一提的是即使是做了PPC（Pay Per Click，按照點擊收費）付費廣告和競價排名，最好也應該對網站進行搜索引擎優化設計，并將網站登錄到各大免費的搜索引擎中。

SEM's services are mainly 4 ways:
1, PPC, paid before the name suggests is the site to be your search engine and front rank, who paid the higher the ranking the more toward the front; PPC services are provided by customers to buy keywords for their website rankings, total per-click a service fee. Customers can pay by adjusting the price per click, control their own specific keyword in the search results ranking; and can set different key words to capture different types of targeted visitors.
In the most popular PPC search engines, Baidu, Yahoo and Google. It is worth mentioning that even do PPC (Pay Per Click, pay per click) ads and PPC, the best should also be search engine optimized website design and website log on to the major free search engines .

　　二、 購買關鍵詞廣告，即在搜索結果頁面顯示廣告內容，實現高級定位投放，用戶可以根據需要更換關鍵詞，相當于在不同頁面輪換投放廣告；

Second, buy keyword advertising on search results page displays the advertising content, to achieve high positioning put in, the user can be replaced key words, the equivalent of rotation of ads in different pages;
　　三、 搜索引擎優化（SEO），就是通過對網站結構、關鍵字選擇、網站內容規劃進行調整和優化，使得網站在搜索結果中靠前。 搜索引擎優化（SEO）又包括網站內容優化、關鍵詞優化、外部鏈接優化、內部鏈接優化、代碼優化、圖片優化、搜索引擎登錄等。
　　PPC 為 Pay Per Click的縮寫 PPC是英文Pay Per Click的縮寫形式,其中文意思就是點擊付費廣告。
　　目前，SEM正處于發展階段，它將成為今后專業網站乃至電子商務發展的必經之路。
　　SEO是屬于SEM的一部分，是實現SEM搜索引擎整合營銷的一種手段。

Third, search engine optimization (SEO), is through to the site structure, keyword selection, site planning to adjust and optimize the content so that site in search results front. Search Engine Optimization (SEO), it also includes web content optimization, keyword optimization, external link optimization, internal link optimization, Code optimization, image optimization, search engine registry and so on.
PPC stands for the Pay Per Click Pay Per Click PPC is the abbreviation of the English form, its meaning in Chinese is click advertising.
At present, SEM is in the development stage, it will be the future development of professional e-commerce website and even a must.
SEO SEM are a part, is to achieve integrated search engine marketing SEM as a means.