Think of it like radio-if you drive through an area with a ton of competing stations, you won’t be able to hear any of them clearly, right? It’s the same with Wi-Fi. The thing to find out, though, is whether you and your neighbors happen to be using the same wireless channel. Or maybe you live in a densely populated area, and your neighbors’ networks are fighting with your own. Maybe your service provider is in the middle of an outage. Maybe your router has hardware problems or is misconfigured.
If your home Wi-Fi has slowed to a crawl, there are all kinds of possible reasons why.