01 Who We Are
SystemDesignTutorial.com ("the Site", "we", "us", "our") is a free educational resource teaching software system design concepts. The Site is operated independently.
Contact: admin.systemdesigntutorial@gmail.com
02 Information We Collect
We collect information in two ways: automatically through your use of the Site, and from third-party services we use to operate it.
Automatically collected:
- Log data such as your browser type, operating system, referring URL, pages visited, and time/date of your visit
- Your IP address (used to infer approximate geographic region for analytics purposes)
- Device type (desktop, tablet, mobile)
We do NOT collect:
- Your name, email, or any personal account information (this site has no account system)
- Payment or financial information
- Sensitive personal data of any kind
03 Cookies
We use cookies — small text files stored on your device — to enable site functionality and advertising. Cookies used on this site include:
- Essential cookies: required for basic site operation (e.g., storing your quiz progress within a session)
- Analytics cookies: used by Google Analytics (if enabled) to understand how visitors use the site. Data is anonymized and aggregated.
- Advertising cookies: placed by Google AdSense and its partners (including DoubleClick) to serve personalised advertisements based on your interests and browsing history. These cookies are set by Google, not us.
You can control or opt out of cookies at any time through your browser settings, or by visiting Google's Ad Settings to manage personalised advertising.
04 Google AdSense & Third-Party Advertising
This site participates in Google AdSense, an advertising programme run by Google LLC. Google AdSense uses cookies and web beacons to serve advertisements on this site. Google may use data about your visits to this and other websites to provide advertisements about goods and services of interest to you.
Key facts about Google AdSense:
- Google uses the DoubleClick cookie to serve ads based on your prior visits to this website or other websites.
- Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website.
- Google is a member of the Network Advertising Initiative (NAI) and adheres to the Digital Advertising Alliance (DAA) Self-Regulatory Principles.
- You may opt out of personalised advertising by visiting Google's Ads Settings or aboutads.info.
For more information about how Google collects and uses your data, please see Google's Privacy Policy.
05 How We Use Information
We use the information we collect to:
- Operate and improve the Site and its educational content
- Understand how visitors use the Site (aggregate analytics)
- Display advertisements via Google AdSense that help fund the Site
- Comply with legal obligations
We do not sell, trade, or rent your personal information to any third party.
06 Third-Party Services
This site uses the following third-party services, each governed by their own privacy policy:
- Google AdSense — advertising — Google Privacy Policy
- Google Fonts — typography (Fraunces, DM Sans, JetBrains Mono) — font files are requested from Google servers when you visit the site
- Google Analytics (if enabled) — site usage analytics — Google Privacy Policy
07 Data Retention
We do not store personal data on our own servers. Any data collected by third-party services (Google Analytics, Google AdSense) is retained according to those services' own data retention policies.
08 Your Rights
Depending on your location, you may have the following rights regarding your personal data:
- GDPR (European Union): Right to access, rectification, erasure, restriction of processing, data portability, and objection to processing.
- CCPA (California, USA): Right to know what data is collected, right to delete personal information, and right to opt out of the sale of personal information.
- All users: Right to opt out of personalised advertising at any time via Google's Ad Settings.
To exercise any of these rights, please contact us at admin.systemdesigntutorial@gmail.com.
09 Children's Privacy
This Site is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided personal information to us, please contact us immediately and we will take steps to delete it.
10 Changes to This Policy
We may update this Privacy Policy from time to time. When we do, we will update the "Last updated" date at the top of this page. Continued use of the Site after any changes constitutes acceptance of the updated policy. We encourage you to review this page periodically.
11 Contact Us
If you have any questions about this Privacy Policy or how we handle your data, please contact us:
Email: admin.systemdesigntutorial@gmail.com
Website: systemdesigntutorial.com