Your device shows a Wi-Fi connection, yet websites do not load. The wireless link to a local network and that network’s access to the wider internet are related but separate parts of the path.
Read the connection status
Microsoft’s Wi-Fi troubleshooting guide explicitly distinguishes being connected to Wi-Fi from having detected internet access. The exact wording and controls depend on the Windows version.
Record the message and whether the problem affects every site or only one. A single missing page is different from a broad connection problem.
Compare a few observations
On a network you are authorised to use, check whether another device has the same difficulty. Note whether a required sign-in page is expected on a public network, using the operator’s legitimate instructions.
Do not change a shared router or managed network’s configuration merely because one page fails. Gather enough evidence to identify the scope first.
Report the boundary
A useful message says which device, network and services are affected, and when the issue began. Avoid posting Wi-Fi passwords or private network details publicly.
Compare this with a 404 response. Knowing which part of the route works can prevent a small website problem from becoming an unnecessary network overhaul.