Privacy Policy
Last updated: 9 September 2026
This Privacy Policy explains what information Hiusvu Blog ("the Site", "we", "I") collects when you visit www.hiusvu.io.vn, how it is used, and the choices you have. The Site is a personal technology blog operated by Hiusvu.
1. Information we collect
1.1 Information you give us
If you use the contact form, we receive the name, email address, optional phone number and message you type. This information is used only to reply to you. The form is delivered by Web3Forms, a third-party form service, which processes the submission on our behalf and forwards it to our email inbox.
1.2 Information collected automatically
Like most websites, the Site and its hosting provider (Vercel) automatically receive technical information when you visit: your IP address, browser type, device type, referring page, the pages you view and the time of your visit. This data is used for security, performance and aggregate statistics.
1.3 Analytics
We use Google Analytics 4 to understand how visitors use the Site: which posts are read, how long people stay, which country and device they come from. Google Analytics sets cookies (for example _ga and _ga_*) and collects data such as an anonymised identifier, approximate location and browsing behaviour on the Site. IP addresses are not stored by Google Analytics 4. Google processes this data under its own privacy policy, which you can read at policies.google.com/privacy.
2. Cookies and advertising
The Site uses cookies and similar technologies for analytics as described above. We may also display advertising served by Google AdSense or other third-party advertising partners. These partners use cookies, including the Google DoubleClick cookie, to serve ads based on your prior visits to this and other websites and to measure ad performance. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to the Site and/or other sites on the Internet.
You can control this:
- Opt out of personalised advertising by Google at google.com/settings/ads.
- Opt out of third-party vendors' use of cookies for personalised advertising at aboutads.info/choices.
- Block Google Analytics with the Google Analytics opt-out browser add-on.
- Delete or block cookies entirely in your browser settings. The Site will still work.
3. How we use information
- To operate, secure and improve the Site.
- To understand which content is useful and plan future posts.
- To reply to messages you send us.
- To display and measure advertising, where advertising is shown.
We do not sell your personal information.
4. Third parties that process data
- Vercel (hosting and CDN)
- Google (Analytics and, where shown, AdSense advertising)
- Web3Forms (contact form delivery)
Each of these providers processes data under its own privacy policy and may store data outside your country, including in the United States.
5. Data retention
Contact form messages are kept in our email inbox for as long as needed to handle your request. Google Analytics data is retained according to the retention setting in our Google Analytics property, which is currently 14 months for user-level data. Server logs are retained by the hosting provider for a limited period for security purposes.
6. Your rights
Depending on where you live, you may have the right to access, correct, delete or restrict the use of your personal data, or to object to its processing. To exercise any of these rights, email nghiusvu@gmail.com. We will respond within a reasonable time.
7. Children
The Site is not directed at children under 13 and we do not knowingly collect personal information from them.
8. External links
Posts link to other websites. We are not responsible for the privacy practices or content of those sites.
9. Changes to this policy
We may update this policy from time to time. The date at the top shows when it was last changed. Continued use of the Site after a change means you accept the updated policy.
10. Contact
Questions about this policy: nghiusvu@gmail.com or the contact page.