Cookie Policy
Page updated: October 3, 2026
About cookies and similar technologies
Cookies are small text files stored on your device by websites you visit. Together with our providers, we use cookies and similar technologies to operate the Site, measure how it is used, and show advertising that keeps the Site free.
How you control cookies on this site
We use Google Consent Mode. By default, analytics and advertising cookies are set to denied when you arrive, so they are not used until you make a choice. Google then shows its own consent message, and your choice there controls both advertising and analytics cookies. Strictly necessary cookies are always active because the Site cannot work without them.
You can also manage or delete cookies at any time through your browser settings, and use the advertising opt-out links further down this page.
Categories and examples of cookies we use
The table below lists representative cookies and similar technologies. Exact names and durations set by Google and its advertising partners may change; the consent message shows the current list of advertising partners.
| Cookie / technology | Purpose | Typical duration | Set by |
|---|---|---|---|
learn_volley_session & XSRF-TOKEN |
Strictly necessary. Keep the Site working and protect requests against cross-site request forgery. Required for the Site to function. | 2 hours | First party (Learn Volley) |
lv-units (local storage) |
Preference. Remembers whether you chose metric or imperial units on English pages. Stored only in your browser and never sent to us. | Until you clear it | First party (Learn Volley) |
FCCDCF (and related consent cookies) |
Consent. Google's consent message stores a record of your consent choices so you are not asked repeatedly. | Up to ~13 months | Third party (Google) |
_ga, _ga_<id> |
Analytics. Google Analytics (GA4) helps us understand how visitors use the Site. Set only if you consent. | Up to 2 years | Third party (Google) |
__gads, __gpi and advertising-partner cookies |
Advertising. Used by Google AdSense and its partners to show ads, cap how often you see an ad, and — where you consent — to personalize ads and measure performance. | Varies (often up to ~13 months) | Third parties (Google & TCF vendors) |
YouTube video player (www.youtube-nocookie.com) |
Embedded videos. Videos are click-to-play: before you click, only a preview image is loaded from i.ytimg.com and no cookies are set. After you click play, YouTube/Google may set cookies or use local storage on your device for playback and related purposes. See our Privacy Policy. |
Varies (set by YouTube) | Third party (Google/YouTube) |
Advertising, Google and third-party partners (IAB TCF)
We display ads through Google AdSense, and the consent message on our Site is Google's Consent Management Platform operating under the IAB Europe Transparency & Consent Framework (TCF). This means that, if you consent, data may be shared not only with Google but also with a number of third-party advertising partners (for example ad exchanges and demand-side platforms).
The complete, current list of partners is shown inside the consent message itself (use "Manage options" / "View partners"), and the framework's registered vendors are published on the IAB Europe TCF vendor list. If you do not consent, you may still see ads, but they will not be personalized. Depending on your choices, Google may show non-personalized or "limited" ads that use fewer or no cookies.
Changing your choice and “Do Not Sell or Share”
You can change or withdraw your consent at any time by reopening the consent message (see the "Cookie & consent settings" link in the site footer). Because consenting may involve sharing personal information with advertising partners, California residents may treat this as a right to opt out of "sale"/"sharing" of personal information — you can exercise it through the same consent message, and we honor a browser Global Privacy Control (GPC) signal where applicable. You can also manage Google ad personalization in Google My Ad Center.
How to control and delete cookies
Browser settings
You can manage or delete cookies via your browser settings at any time. Disabling cookies may affect how the Site works. Browser guides:
Opt out of interest-based advertising
You can opt out of interest-based advertising through these industry programs and Google's own controls:
- Google My Ad Center
- Your Online Choices (EDAA)
- Digital Advertising Alliance (DAA)
- Network Advertising Initiative (NAI)
Changes to this Cookie Policy
We may update this Cookie Policy from time to time to reflect changes in technology or the law. The latest version will always be available on this page with the "Page updated" date above.
Questions about cookies? Email learnvolley@proton.me or read our Privacy Policy.
This Cookie Policy is provided for general information and transparency and is not legal advice. If you need to be sure it meets your specific legal obligations, please consult a qualified professional.