Скачать или смотреть How to Block Internal Traffic from Google Analytics in GA4

How to Block Internal Traffic in GA4 (Step-by-Step)
Log in to your Google Analytics account.

In the left-hand menu, go to Admin.

Under the Property column, click on Data Streams.

Click on the data stream you want to modify (if you have multiple streams, choose the relevant one).

Scroll down to the Google Tag section and click Configure Tag Settings.

Scroll down and click on Show More.

Scroll again and click on Define Internal Traffic.

Click on the Create button to create a new rule.

In the Rule Name, enter something like:

My Internal

Myself

Or your name

Go to whatismyip.com in a separate tab.
It will display your current IP address automatically — no login or clicks needed.

Copy the IP address shown on that site.

Back in Google Analytics, in the IP address field, paste your IP, and add /32 at the end.
Example: 123.45.67.89/32

Use /32 to block only your specific device.

Use /24 if you want to block a wider network (e.g., an office with multiple users).

Click Create at the top right of the screen.