How does Delete Cookies affect Google Analytics? Will website analysis become more difficult?

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Last time, we gave you a brief introduction to the Internet ecology of Hong Kong residents . In this article, I hope to bring you more interesting information. As Internet usage increases day by day, 6 hours of online life will definitely leave a lot of footprints for everyone. For a long time, terms such as "browsing history" and "network tracking" have been given positive characterizations in reports and speeches by major Internet giants. But as the use of online data matures, the chances of data leakage seem to increase. In view of this, a new page on online privacy was added to the 2020 Digital Marketing Report.

Photo from Internet
46% of people have deleted their browsing history
The report mentioned that 46% of respondents said they had deleted their browsing history in the past month. Browsing history has always brought a lot of convenience to our lives, and it has also made our online life and even advertising more personal. Although it brings convenience, the fact reflects that people are beginning to pay attention to online privacy and start deleting browsing history.

Digital privacyPhoto from wearesocial
The impact of cookies on Google Analytics
If you have ever used Google Analytics, you may have noticed that belgium whatsapp the two categories of users are "New" and "Old" users (New & Returning User). But have you ever thought about how GA characterizes and distinguishes new and old users?

User definition:
In the eyes of GA, users are just a bunch of numbers. Whenever you enter a new website, GA will give you a user ID, and the ID consists of a set of randomly composed numbers plus the first time you enter. Composed of network timestamp, for example: 1307930464.1581943268

Timestamp converter random timestamp:

Digital privacyPhoto from unixtimestamp
How does GA count new and old users?
When your device or browser enters the website for the first time, the GA on the site will give you a new user ID. Subsequently, each time the GA on the site detects the same user ID through browsing history, the user ID will be used. All users will be defined as old users. But everyone should pay attention to one thing. The user ID detected by GA will be affected by the device and browser. If you use different devices and browsers to enter the website, you will have a new user ID! In other words, when a customer deletes their browsing history, customers who should have been classified as "old" users will be defined as new users! (Assuming there is no Google account login on the device and browser)