Very simple. I strive to collect the bare minimum of information that is necessary for users to get answers to their questions. We do not share any information about you with anyone. We also do not collect information like customer names, etc, besides what you would provide if you register (we do not ask for a name, home address, or phone number). We have a feature where customers can let their friends know about this site. We store the friends' email addresses in order to notify them when answers are available to their questions, but do not use them otherwise. Google adsense ads that you may see on this site, may use cookies, web beacons and some such things that are a little beyond my understanding. But Google tried to not be evil.
At behest of Google Adsense, I allow third-party ads on my site. You may opt out of cookies provided by those vendors.
We only use the information that you provided, like your email address, to update you on the status of your math questions. We are fully compliant with GDPR.