Poor Wi−Fi signal (Shared Internet connection)

A Wi-Fi range extender is a kind of wireless repeater used to expand the range of a Wi-Fi connection. It will cover all the gaps in your house or apartment and will improve your Wi-Fi signal.

Famous Wi-Fi range extenders include Netgear Nighthawk AC1900 Wi-Fi Range Extender (EX7000) and TP-Link AC1750 Wi-Fi Range Extender (RE450).

Too many electronic devices connected to a router can overwhelm your Wi-Fi connection. Consider buying another router and connecting it to the other router via an Ethernet cable. By doing this, you will be able to connect even more devices to your Wi-Fi network and the Wi-Fi signal won't suffer.

Perhaps your router needs an update. Router manufacturers are constantly working on improving the router's software and its performance.

Open the router's user interface and hit the Upgrade button.

Note: Before you do the upgrade, connect the router to the computer/laptop via an ethernet cable.
If you are not sure how to access the router's user interface, check out the don't know how to access my router guide.