Click ID is created by a platform (META, Google, Sklik..), which can pass this key for reverse matching to us via a URL. So you could say that it is moving into 2nd party data mode.
This simply means that keys that “belong” to the first parties and are not direct personal data that our customer has provided to us directly (e.g. email) can be matched. You need marketing consent to collect and pass it on to another party.
What to watch out for?
Whether your website removes these technical parameters after entering the website. The reason may be poor technical functioning bc data america of the website (e.g. it removes long strings of characters).
But also targeted removal (e.g. due to statistics in Google Analytics with the aim of merging statistics under a URL without parameters or limiting their indexing).
However, targeted removal is properly done only on the collected data or is solved by other methods. See the article by Marek Lecián.
The problem with parameters
May only occur on some parts engaging email marketing campaigns that convert of the website/e-shop. For example, when using parameters in URL addresses that contain filters or various anchors on the page (using # in the URL).
Identify specific types of pages that you have on your website/e-shop (homepage, product, product variants, filters, content anchors, etc.)
Add parameters after these URL addresses. E.g. for META Ads:
If the parameter disappears from the URL after loading the first page, you have a problem. You also have a problem if you have a poorly china phone numbers implemented bar and after interacting.
With it, the page refreshes and the parameter disappears from the URL. This means that you have a poorly implemented consent bar.