google analytics 中的UTM参数对于流量区分追踪用途大大的有，拷贝了一份很详细的文档过来
| 变量 | 描述 | 值示例 |
|---|---|---|
| utmac | 用于区别不同帐号的字串，所有请求中都有 | utmac=UA-2202604-2 |
| utmcc | Cookie 值，这个请求参数发送所有的cookie请求 | utmcc=__utma%3D117243.1695285.22%3B%2B __utmz%3D117945243.1202416366.21.10. utmcsr%3Db%7C utmccn%3D(referral)%7C utmcmd%3Dreferral%7C utmcct%3D%252Fissue%3B%2B |
| utmcn | Starts a new campaign session. Either utmcn or utmcr is present on any given request. Changes the campaign tracking data; but does not start a new session | utmcn=1 |
| utmcr | Indicates a repeat campaign visit. This is set when any subsequent clicks occur on the same link. Either utmcn or utmcr is present on any given request. | utmcr=1 |
| utmcs | 浏览器的语言编码，某些浏览器不支持此项，在这种情况下会被社会设置为 “-“ | utmcs=ISO-8859-1 |
| utmdt | 页面标题，是一个URL-encoded 字串 | utmdt=analytics%20page%20test |
| utme | 扩展参数 | Value is encoded. Used for events and custom variables. |
| utmfl | Flash 版本 | utmfl=9.0%20r48& |
| utmhn | 主机名，是一个URL-encoded 字串 | utmhn=x343.gmodules.com |
| utmipc | 产品码。这是一个特定产品SKU码 | utmipc=989898ajssi |
| utmipn | 产品名称，是一个URL-encoded 字串 | utmipn=tee%20shirt |
| utmipr | 单品价格。仅美元格式 | utmipr=17100.32 |
| utmiqt | 数量 | utmiqt=4 |
| utmiva | Variations on an item. For example: large, medium, small, pink, white, black, green. String is URL-encoded. | utmiva=red; |
| utmje | 浏览器是否启用java小程序，1 为真 | utmje=1 |
| utmn | Unique ID generated for each GIF request to prevent caching of the GIF image. | utmn=1142651215 |
| utmp | 当前页面的页面请求 | utmp=/testDirectory/myPage.html |
| utmr | 完整的来源页面 | utmr=http://www.example.com/aboutUs/index.php?var=selected |
| utmsc | 屏幕的颜色质量 | utmsc=24-bit |
| utmsr | 屏幕分辨率 | utmsr=2400×1920& |
| utmt | 定义请求的类型，为其中之一：event、 transaction、item、custom variable。如果GIF请求中不包含这些值，则请求类型为page。 |
utmt=event |
| utmtci | Billing City | utmtci=San%20Diego |
| utmtco | Billing Country | utmtco=United%20Kingdom |
| utmtid | Order ID, URL-encoded string. | utmtid=a2343898 |
| utmtrg | Billing region, URL-encoded string. | utmtrg=New%20Brunswick |
| utmtsp | Shipping cost. Values as for unit and price. | utmtsp=23.95 |
| utmtst | Affiliation. Typically used for brick and mortar applications in ecommerce. | utmtst=google%20mtv%20store |
| utmtto | 总计 | utmtto=334.56 |
| utmttx | 税 | utmttx=29.16 |
| utmul | 浏览器语言 | utmul=pt-br |
| utmwv | 跟踪代码的版本 | utmwv=1 |
一个完整的google analytics gif请求
http://www.google-analytics.com/__utm.gif?utmwv=4&utmn=769876874&utmhn=example.com&utmcs=ISO-8859-1&utmsr=1280x1024&utmsc=32-bit&utmul=en-us&utmje=1&utmfl=9.0%20%20r115&utmcn=1&utmdt=GATC012%20setting%20variables&utmhid=2059107202&utmr=0&utmp=/auto/GATC012.html?utm_source=www.gatc012.org&utm_campaign=campaign+gatc012&utm_term=keywords+gatc012&utm_content=content+gatc012&utm_medium=medium+gatc012&utmac=UA-30138-1&utmcc=__utma%3D97315849.1774621898.1207701397.1207701397.1207701397.1%3B...
from: http://neal.im/google-analytics-UTM-details
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