background

To use GA, you need to use referer to check the source

The problem

Chrome 85 will adjust the referreer-policy, default because no-referreer-when – reel-must change to strict-origin-when-cross-origin

Failed to obtain pass-through parameters, causing attribution failure

To solve

2 Add ref=unsafe-url to the href of the a tag

What is a Reffer policy

Reference:

Chrome 85’s Referreer-Policy changes affect site analytics tools

Referrer-Policy