Privacy & Cookies
This is a content site about technical marketing. The three things worth knowing are short: what is collected, why, and how to say no.
1. What this site collects
Analytics. Google Analytics 4 (property G-BTDZ6Q938T), loaded through Google Tag Manager. The _ga and _ga_BTDZ6Q938T cookies are written only after you press Accept, and are used to tell unique visitors apart and to measure page views and referrers. If you choose Essential only, GA4 runs in cookieless mode and sends aggregate signals without identifiers, used for coarse counting.
Anonymous visit counter. Only on tool pages such as the media-plan generator, the browser stores a random id (vuid) in localStorage; the server keeps just a de-duplicated set of ids and a total. No IP address, user agent or timestamp is stored. Clearing local storage resets it.
Functional local storage. Language preference (sb-lang) and your consent choice (sb-consent) stay in your browser and are never uploaded.
Server logs. Kept as usual by the hosting provider, including IP address and user agent, used only for security and troubleshooting.
2. Legal basis and retention
Analytics cookies rely on your consent (GDPR Art. 6(1)(a) and the ePrivacy Directive) and can be withdrawn at any time. Server logs and security rely on legitimate interests (Art. 6(1)(f)).
_ga cookies are kept for up to 2 years (GA4 setting). Your consent choice stays in your browser until you clear it or this policy's version changes.
3. Cookie list
| Name | Purpose | Duration | Consent |
|---|---|---|---|
| _ga | Distinguishes unique visitors (Google Analytics 4) | Up to 2 years | Required |
| _ga_BTDZ6Q938T | Keeps GA4 session state | Up to 2 years | Required |
| sb-consent | Stores your consent choice (localStorage) | Until cleared | Not required |
| sb-lang, vuid | Language preference, anonymous counter id (localStorage) | Until cleared | Not required |
4. Third parties and transfers
Analytics is provided by Google LLC (United States). Accepting means the related usage data is transferred to and processed in the US; Google relies on the EU-US Data Privacy Framework and standard contractual clauses. This site runs no personalised advertising, does not enable Google Signals, and does not sell or share this data for marketing.
5. Your rights
- Change or withdraw consent at any time: use the Cookie settings button at the bottom of this page, or clear this site's local storage.
- Request access, correction or deletion, or object to processing: use the contact page and I will reply within 30 days.
- If you believe the processing is unlawful, you may complain to the data protection authority in your country or region.
6. Contact
Site owner: SONGBING. WeChat: songbing_com_cn (please mention "privacy"). You can also use the contact page.