Config ID how it is working?

General questions
1

Hello,

I got a question regarding config ID , how it is working this option. For instance in the following case when I am leaving the website how they know it is the same config ID id , if the window it is setting up at 6 hours and I am coming back after 2 hours.

Thank you

2

You will find answer to your questions here https://matomo.org/faq/general/how-is-the-visitor-config_id-processed/

Jean-Michel

3

Hi , I want to know how to set config_ID for cookie less tracking.

4

From what I understand, the config ID is generated based on a mix of browser and device attributes (like OS, browser version, plugins, etc.), so it can recognize the same visitor within a certain time window. If you return within that window (e.g., 6 hours), it’s likely to match the same config ID, but it’s not 100% reliable since small changes in the environment can generate a new one.