Category | Examples | Purpose | Typical duration |
Essential | Consent preference; __ddgN, _ddgid, __ddgmark where used | Remember consent choices; security, anti-abuse and DDoS protection. These cannot be disabled through the banner. | Session or provider-defined |
Tilda analytics | tildasid, tildauid, TILDAUTM; previous URL where recorded | Internal traffic and campaign statistics, referral and UTM attribution. Used only where permitted by your consent configuration. | Up to 90 days or provider/configuration-defined |
Google Analytics 4 | _ga, _ga_<container-id> and related identifiers | Distinguish users and sessions, understand page use, events and traffic sources. | Typically up to 2 years; configurable by the provider |
Advertising / Meta Pixel | _fbp; _fbc where applicable | Measure conversions, campaign performance, remarketing and ad optimisation. | Typically up to 3 months; provider-defined |