| _fbp | Meta / Facebook | Used to measure and deliver advertising. | Up to 3 months |
| _fbc | Meta / Facebook | Stores Facebook click information for conversion attribution. | Up to 3 months |
| _gcl_au | Google Ads | Used by Google Ads for conversion linker functionality. | Up to 3 months |
| IDE | Google DoubleClick | Used for advertising delivery, measurement and personalization where consent is given. | Up to 13 months |
| MUID | Microsoft Advertising | Used for Microsoft Ads conversion tracking and advertising. | Up to 13 months |
| pys_session_limit | PixelYourSite | Used by PixelYourSite for pixel event attribution and traffic-source tracking. | Session / variable |
| pys_start_session | PixelYourSite | Used by PixelYourSite for pixel event attribution and traffic-source tracking. | Session / variable |
| pys_first_visit | PixelYourSite | Used by PixelYourSite for pixel event attribution and traffic-source tracking. | Session / variable |
| pys_landing_page | PixelYourSite | Used by PixelYourSite for pixel event attribution and traffic-source tracking. | Session / variable |
| last_pys_landing_page | PixelYourSite | Used by PixelYourSite for pixel event attribution and traffic-source tracking. | Session / variable |
