Wi-Fi connects a device wirelessly to a nearby network. Internet access depends on additional connections and services beyond that local link. Full signal bars can therefore coexist with a website that will not load.
Think in separate links
Your device connects to a wireless access point or router. That network needs a working route through the internet service and onward to the destination. The destination itself also has to respond.
The signal indicator mainly describes the local wireless connection. It is not a complete test of the router's internet connection, the service provider, or the website. A strong local signal does not rule out problems elsewhere.
Use a small comparison before changing settings
Check whether the problem affects one website or several, and whether another device on the same network has the same issue. These observations narrow the question without requiring a factory reset or a new router purchase.
If only one device is affected, inspect its connection and the relevant app. If several devices cannot reach multiple sites, check the router and provider status through their official guidance. These are clues, not definitive diagnoses; networks can fail in more than one place.
Avoid a misleading speed comparison
A speed test measures a path under particular conditions. Its result can be affected by the device, wireless environment, server, and other network activity. A router's advertised wireless capability is not a promise that every website will deliver that rate.
Record the time, affected devices, and observed behavior before contacting support. Distinguishing a weak radio link from a wider connectivity problem makes that conversation more useful. The bars tell you something, but they do not tell you everything.
Sources
- Cisco: What is Wi-Fi?
Wi-Fi provides wireless local connectivity; internet access is a separate part of the network path.