After a decade of testing PCs, routers, and home networks, I know what causes slow speeds and how to optimize your internet.
Your browser does not support the video element. A "good" internet speed usually runs at least 25 megabits per second, but it really depends on what you use the ...
If your internet suddenly slows down in the middle of a Netflix marathon, you might be dealing with ISP throttling. And yes, this can still happen, even with net neutrality regulations back in effect.