Best answer by Keith N
However, the thing to remember is that Sonos still needs to get out to the internet. So if you are unable to access a website, switching to a BOOST setup may not actually help the situation as the bottleneck is coming from "behind the BOOST" or the router's connection out to the Internet. Hopefully, you find this article helpful.
If you would like me to clarify anything, please feel free to reach back out and I will be happy to answer any questions.