【正文】 For example, AdWords and AdSense enable ads shown on relevant webpages or aside of search results of prechosen keywords. Another is the payment method. Whatever purchasing variation is selected, the payment is usually relative with audiences39。s screen or floats above the content. Expanding ad: An ad which changes size and which may alter the contents of the webpage. Polite ad: A method by which a large ad will be downloaded in smaller pieces to minimize the disruption of the content being viewed Wallpaper ad: An ad which changes the background of the page being viewed. Trick banner: A banner ad that looks like a dialog box with buttons. It simulates an error message or an alert. Popup: A new window which opens in front of the current one, displaying an advertisement, or entire webpage. Popunder: Similar to a PopUp except that the window is loaded or sent behind the current window so that the user does not see it until they close one or more active windows. Video ad: similar to a banner ad, except that instead of a static or animated image, actual moving video clips are displayed. Map ad: text or graphics linked from, and appearing in or over, a location on an electronic map such as on Google Maps. Mobile ad: an SMS text or multimedia message sent to a cell phone. In addition, ads containing streaming video or streaming audio are being very popular with advertisers. Email advertising Legitimate Email advertising or Email marketing is often known as optin advertising to distinguish it from spam. Affiliate marketing Affiliate marketing was an invention by in 1994 and was excelled by when it launched its Affiliate Program, called Associate Program in 1996. The online retailer used its program to generate low cost brand exposure and provided at the same time small websites a way to earn some supplemental ine. Contextual advertising Many advertising works display graphical or textonly ads that correspond to the keywords of an Inter search or to the content of the page on which the ad is shown. These ads are believed to have a greater chance of attracting a user, because they tend to share a similar context as the user39。s website. Another newer technique is embedding keyword hyperlinks in an article which are sponsored by an advertiser. When a user follows the link, they are sent to a sponsor39。s past clickstream. For example, if a user is known to have recently visited a number of automotive shopping / parison sites based on clickstream analysis enabled by cookies stored on the user39。s home page), spawn popups, and insert advertisements into nonaffiliated webpages. Such applications are usually labeled as spyware or adware. They may mask their questionable activities by performing a simple service, such as displaying the weather or providing a search bar. Some programs are effectively trojans. These applications are monly designed so as to be difficult to remove or uninstall. The everincreasing audience of online users, many of whom are not putersavvy, frequently lack the knowledge and technical ability to protect themselves from these programs. On the status of China39。s situation and development trend. Inter advertising is the main features are: 1 extensiveness and open: the work advertisement can advertising information through Inter allweather, 24 hours uninterruptedly spreads to the world, these effects are traditional media can achieve. In addition, newspapers, magazines, television, radio, and trafflc signs such traditional advertising has a great pulsive, and work advertising process is open, the mandatory, this point with traditional media have a very different nature. 2. Realtime and controllability: work advertisement may according to the customer demand rapid manufacture and launch, while the traditional advertising production cost is high, dropping cycle fixed. Moreover, in the traditional media advertising on hard to change, even after publication can change also often needs to pay big economic costs, and work advertisement can according to customer needs to be changed in the contents of advertisements. So, advertisers business decisionmaking changes can timely implementation and promotion. 3. Directness and pertinence: through traditional advertising, consumers only indirectly touch the promotional products, not through advertising feel directly products or understand the manufacturer of the specific operation and service provision. While Inter advertising is different, as long as consumers saw interested content, directly click, and then enter into this enterprise website, understands the specific contents of the business. In addition, the work advertisement can launch to some specific target groups, even can do oneonone directional issuance. According to the characteristics of different visitors, online advertising can be flexibly achieve time orientation, regional orientation, channel directional, thus fulfilling the consumer clear classified in a certain extent, guarantee the advertisement39。s characteristics of fixedpoint launch and tracking analysis, the advertisement effect makes objective accurate assessment Introduction With the rapid development of Inter work in the world changing and multifaceted. Inter with its crosstemporal, crossregional, illustrated charismatic way of disseminating information, creating a huge market, online advertising has bee one of the work