Many internet users have problem with their WiFi signal. You may have coming into your router, but is the internet reaching your chosen device the way it should be? Back in the day we never had this problem as the majority were on hard-wired internet, which is of course much more reliable. But times have changed and so has the way we browse the internet, thanks to the introduction of laptops, smartphones and tablets.
Have you considered moving your router to a central location in your property? This can help, especially if you browse the internet in different places in your house.
If you have anything obstructing the router, for example a microwave or metal object, then this may also be why your signal is having issues. Move the router away from any obstruction.
Also try and adjust the antenna on your router. This can help send Wi-Fi signal towards the direction you’re located in.