The Federal Communications Commission (FCC) defines the minimum rural broadband speed at 25 Mbps download and 3Mbps upload. The ease of basic internet browsing – measured by the time it takes to download a page – improves with higher speeds up to 10 Mbps, but not beyond. However, higher speeds may be beneficial for demanding applications such as HD streaming video or moving large graphics files.
The FCC is considering increasing the minimum speed of broadband - https://www.washingtonpost.com/technology/2022/07/19/fcc-broadband-new-definition-100mbps/
When considering how much speed you need this article may help - https://www.consumerreports.org/broadband/internet-fast-enough-for-streaming-broadband-speed/