Move Closer to the Router
If at all possible, make sure you’re physically as close to the router or Wi-Fi access point as you can get. That’s not always practical on public networks, as you may not even know where the router is, but you typically do in your home.
The logic here is pretty straightforward: The farther you are from the router, the weaker the signal. Also, try to avoid as many obstructions as possible, like walls. Sometimes, small changes in distance can make a big difference.