How to distinguish between bidding and natural traffic?

Does anyone know how to distinguish between bidding and organic traffic? Is there any way to distinguish them well?

Bidding traffic, organic traffic

There is a small tail behind the bidding link, which is displayed in the form of parameters. The beginning is "Look". If it is search promotion, it is promotion traffic, and if it is baidu.com, it is natural traffic. Let's take a position first. You can just add a suffix to the URL you access, for example, www.baidu.com will have a parameter at the end of the URL, which makes it easier to distinguish.