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I often see people asking for help in some forums,Even some of my customers: Why does my Google Analytic suddenly have no data？After dealing with so many similar issues, I concluded that there are several reasons:
1、Google Analytics library is removed from the page
The code on the page was removed by the ruthless development colleague. Or the basic configuration on Google Tag Manager is deleted, and there is no Google Analytics tracking code on the page, so naturally no data can be collected.
You can check whether Google Analytics code is deployed on the page through Ghostery:
Or look at the network data sending situation in the browser developer status:
A status of 200 indicates that the data was sent successfully.
2、Wrong data view
Your account may have multiple Properties, and one Property has multiple Views. It may be that you saw the wrong data view. Don’t be surprised, this may be a common mistake for beginners.
Make sure you are not using the wrong Property and Data View.
3、Incorrect use of filters
The filter will affect the data in the data view. If you have a filter set, you need to check it: because if your filter is set incorrectly, then there is no data in the data view.
Even if your filter has not been modified in the past period of time, if your data view has no data, I still recommend that you reset your filter, because it may be a rule change in the background of Google Analytics.