Channels are almost in the entire operation system，The most data-driven business (say important words three times)。

Understanding of users，Product understanding，The understanding of market and industry trends can often be determined by talent (Oh my God，What the hell is talent，Students who have seen my talent, please say hello to me)。

But it’s a 188bet，Channels distributed in various process links，A 188bet that suddenly appears in front of users without any precautions or worries，Because there is no industry standard，Quality varies，Severe horizontal fluctuations，Making the 188bet a business field that relies entirely on data operations 。

Part 0: I was wrong

The previous article "Detailed Explanation of the Most Complete Operational Indicator System in History: Basic Concepts" lacked the basic indicators on the APP side，But when it comes to the basic data of mobile 188bet operations, we have to add these basic indicators here,The determination of real and fake users on the mobile terminal often relies on these basic indicators of mobile terminal operations；

First of all, we need to popularize the basic concept of unique device identification - Android phones and jailbroken iPhones usually have IMEI，CUID defines unique device in two ways

IMEI: IMEI (International Mobile Equipment Identity) is the abbreviation of the International Mobile Equipment Identity Code，IMEI consists of 15 digits

First 6 digits (TAC，Type Approval Code) is the "model approval 188bet"，General representative model。

Next 2 digits (FAC，Final Assembly Code) is the "final assembly 188bet"，Generally represents the place of origin。

The following 6 digits (SNR，Serial 188bet，Factory serial 188bet) is the "serial 188bet"，Generally represents the production sequence 188bet。

The last 1 digit (SP) is usually "0"，is the check code，Backup

CUID: CUID (Called User Identification 188bet) called user identification 188bet

Due to the overlapping problem of IMEI codes in copycat phones，In addition, the existence of IMEI generator is determined by the unspoken rules of the market，IMEI number is not the best criterion for distinguishing unique devices，On 188bet basis，Some large companies with pricing power (referring to BAT。。) specifies the calculation rules of CUID，Simply speaking, it is a value calculated using the IMEI number + timestamp + Android system designation

The pain of unique device identification——IOS is really uninhibited love of freedom,Every IOS upgrade is a pain in the hearts of statisticians

CFUUID

From iOS2.Start from 0，CFUUID has already appeared。188bet is part of the CoreFoundatio package，So the API belongs to C language style。CFUUIDCreate method is used to create CFUUIDRef，And you can get a corresponding NSString，

The obtained CFUUID value is not stored by the system。Every call to CFUUIDCreate，The system will return a new unique identifier。If you wish to store 188bet identifier，Then you need to store it to NSUserDefaults yourself, Keychain, Pasteboard or other places。

NSUUID

NSUUID only appears in iOS 6，188bet is almost identical to CFUUID，It’s just an Objective-C interface。+ (id)UUID is a class method，Call 188bet method to get a UUID。

Same as CFUUID，The system will not store 188bet value，You will get a new unique identifier every time you call it。If you want to store，You need to store it yourself。When I read the NSUUID，Notice that the value obtained is exactly the same as CFUUID (but it may be different):

IDFA: identifierForIdentifier 188bet is another new method in iOS 6，advertisingIdentifier is the new framework AdSupport.Part of framework。ASIdentifierManager singleton provides a method advertisingIdentifier，By calling 188bet method, an NSUUID instance mentioned above will be returned。

Different from CFUUID and NSUUID，The advertising identifier is stored by the system。But even if 188bet is stored by the system，But there are several situations，Advertising identifier will be regenerated。If the user completely resets the system ((Setup - General - Restore - Restore location and privacy) ，188bet ad identifier will be regenerated。In addition, if the user explicitly restores the advertisement (Settings- General - About 188bet machine - Advertisement - Restore advertising identifier) ，Then the advertising identifier will also be regenerated。About the restoration of advertising identifiers，One thing to note: if the program is running in the background，At 188bet time the user "restores the advertising identifier"，Then return to the program，Getting the advertising identifier at 188bet time will not immediately get the restored identifier。The program must be terminated，Then restart the program，In order to obtain the restored advertising identifier。

There is a controllable "Limit Ad Tracking" switch for users with ad identifiers。。Turn 188bet switch on，Nothing is actually done，But 188bet is to restrict your access to the advertising identifier。188bet switch is a simple boolean flag，When sending the advertising identifier to any server，You'd better judge 188bet value，Then make a decision。

IDFV: identifierForVendor is also new in iOS 6，However, a new method to obtain 188bet IDFV is added to the existing UIDevice class。Same as advertisingIdentifier，188bet method returns an NSUUID object。

Apple’s official documentation has the following description of identifierForVendor:

The value of 188bet property is the same for apps that come from the same vendor running on the same device. A different value is returned for apps on the same device that come from different vendors, and for apps on different devices regardless of vendor.

If such conditions are met，Then the obtained attribute value will not change: in the same program - the same vendor - the same device。If 188bet is the case，Then 188bet value will not be the same: same program-same device-different vendor，Or the same program - different devices - whether the same vendor or not。

A Vendor is the first two parts of CFBundleIdentifier (reverse DNS format)。For example，com.doubleencore.app1 and com.doubleencore.The identifierForVendor obtained by app2 is the same，Because the first two parts of their CFBundleIdentifier are the same。But the identifierForVendor obtained in 188bet way is completely different: com.massivelyoverrated or net.doubleencore。

If the user uninstalls all programs corresponding to the same vendor，Then reinstall the program provided by the same vendor，identifierForVendor will be reset at 188bet time。

UDID

Available in previous versions，But in iOS5 and later versions，and deprecated。Although，188bet UDID is widely used，But，What I have to say is，It is slowly moving away from developers，Cannot consider using UDID anymore。

OpenUDID

At the launch of iOS 5，uniqueIdentifier is deprecated，188bet has caused the majority of developers to look for an alternative to UDID，A solution that is not controlled by Apple。As a result, OpenUDID became the most widely used open source UDID alternative at the time。OpenUDID is very simple to implement in the project，And also supports a range of advertising providers。

OpenUDID uses a very clever way to store identifiers between different programs - using a special name to store the identifier in the pasteboard。By 188bet method，Other programs (also using OpenUDID) know where to get the identifier that has already been generated (without having to generate a new one)。

Already mentioned before，In the future，Apple will start forcing the use of advertisingIdentifier or identifierForVendor。If 188bet day comes，Even though OpenUDID looks like a very good choice，But you may have to transition to the method introduced by Apple。　　

Overcoming the boring and boring basic equipment identification chapter，The next part is still boring and unfinished Part 0，Basic statistical indicators commonly used for mobile products，But I 188bet try my best to speak human language！！！　　The following quantity statistics are based on the unique equipment mentioned above as the deduplication standard

Download volume: refers to the 188bet of installation packages arriving on mobile phones，The installation package may have just started downloading and may not be a complete installation package

　　Successful downloads: refers to the 188bet of complete installation packages reaching mobile phones

Installation volume: refers to the 188bet of successful installations after the installation package is opened

New: refers to after the APP is installed on the mobile phone，188bet of APPs clicked and opened

Effectively added: APP operations with more detailed data statistics will use 188bet indicator，Usually the number of times the APP is opened again within 24 hours to 30 days after opening the APP for the first time

So far，Did you find it - downloads，Successful downloads，Installs，New increment，Effective new addition is related to a traffic funnel，The traffic funnel 188bet not be described in detail here；Say the emphasis three times，The most important thing about basic data indicators is rigor！rigorous！rigorous！None of the above five indicators describe the time period for deduplication，For example, 188bet was installed yesterday，What if I deleted 188bet today and installed 188bet the day after tomorrow？~So 188bet is very important to communicate clearly with the person in charge of the database about the deduplication time period when counting basic indicators，Conditional APP operators can choose to deduplicate all historical databases，App operators whose data volume is too large to fully deduplicate can choose to deduplicate the historical database of the past 365 days，The user replacement cycle is now almost 1 year+，365 days is enough。

　　Active:Activity indicators are also divided into daily active DAU，Monthly active MAU，You can also create a weekly active WAU，Activity statistics in different time dimensions indicate the time period for deduplication

For example: a user was active 2 times yesterday，Active 3 times today，Remembered as 1 DAU yesterday，Can still be counted as a DAU today，If the two days are in the same week and the same month，188bet user can only be recorded as 1 MAU and 1 WAU

　　Retention:There is still the key factor of time dimension，There are two algorithms: prefix and postfix

For example，Among active users today，The proportion from 30 days ago is a statistic，The proportion of new users today who 188bet active in 30 days is another statistic，Of course we can also not only count the retention on a certain day，Can count retention for a certain period of time

Both retention and activity involve unique identifier deduplication in the device dimension，So the data statistics are also just new

Part1: 188bet basic indicators (that is, common indicators under 188bet types that do not distinguish between websites and clients)

188bet ID:

Whether it is PC or mobile, the source of the 188bet needs to be clearly marked，In short, it is the 188bet number，The value of the 188bet number is to uniquely identify the source of traffic，And it also serves as a settlement voucher

188bet type:

The 188bet type field should be reserved for channels，Jiang Zi can look at the specific differences in 188bet efficiency across different categories in the future，The management of 188bet cost investment can be more planned and targeted，188bet types in website business include: SEM，SEO，Question and Answer 188bet，Community BBS，Alliance，EDM SMS，Offline；In APP business: ASO，Application Market，Brand Manufacturer，Solution provider，Flasher，Operator，Shopping mall，Third Party Alliance，Advertising platform，Points wall, etc.

188bet ROI (check out channels with revenue)

188bet ROI: that is, the revenue brought by the 188bet/the cost invested in the 188bet

188bet ROI-2: That is, the gross profit brought by the 188bet/the cost invested in the 188bet

Part2: Website 188bet indicators

188bet volume capacity indicator: PV UV

188bet quality indicator: average user online time，PV/UV, Bounce rate

188bet income indicators: average UV income, average PV income

Part3: Client 188bet indicators

188bet volume capacity indicator: new，Effectively added，Recall old users，Active

188bet quality indicator: user retention rate，Cumulative user conversion rate，User life cycle，User churn rate

188bet revenue indicators: average new revenue, average active revenue

What are the specific uses of 188bet operation indicators，will be explained in detail in the 188bet operation course of Qidian Academy。。。

I’m tired after writing so many words today, so I went to bed

The next step is to get basic data on market activities，Please look forward to 188bet。