Hi, I am an Independent Advisor, and welcome to Microsoft Q&A.
I believe you are referring to the Windows 10 Consumer Extended Security Updates (ESU) program.
The Windows 10 Consumer Extended Security Updates (ESU) program is a paid service from Microsoft that gives you security updates for Windows 10 even after official support ends on October 14, 2025.
To know more about ESU, please go to this link.
One of the FAQs for Windows 10 ESU.
"Why should I enroll in ESU?
If you need more time to move to Windows 11, and plan on using your Windows 10 PC after October 14, 2025, enrolling in ESU can give you peace of mind by helping protect your Windows 10 device until the program ends on October 13, 2026."
"How long will the consumer ESU program be available?
You can enroll in ESU any time until the program ends on October 13, 2026. If you enroll after the ESU program launches, you will receive any previous updates as well as any future updates."