Cookie Policy

Last updated: July 2026

Strictly necessary cookies

eto_session — keeps you signed in. Set only when you log in; expires after 30 days.
theme — remembers your light/dark preference for one year.

These are required for the site to function and cannot be switched off.

How we ask for consent

Consent for analytics and advertising cookies is collected through Google's certified consent management platform, which shows a consent message where the law requires one (the EEA, the UK and Switzerland). Your choice is passed to Google using Google Consent Mode before any analytics or advertising data is collected, so nothing is stored on your device until you agree.

Analytics cookies (optional)

We use Google Analytics with IP anonymisation to understand which topics help learners most. Analytics cookies are only stored once you consent. Without consent, Google Analytics stores nothing on your device and receives only anonymous, cookieless measurement signals that cannot identify you.

Advertising cookies (optional)

This site is funded by Google AdSense advertising. Advertising cookies — used to personalise ads and measure their performance — are only stored once you consent. Without consent you will still see ads, but they are non-personalised: they are chosen from the content of the page rather than from your interests, and Google does not read or write advertising cookies on your device for them.

Google may still process your IP address to serve ads and prevent fraud, as described in how Google uses information from sites that use its services.

Changing your choice

Use the Cookie settings link at the bottom of any page to reopen the consent message and change or withdraw your choice at any time. You can also manage ad personalisation across all sites at Google My Ad Center. See also our Privacy Policy.