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Default web browsers for Windows and Mac computers are Microsoft Edge and Safari, respectively, but you can use any web browser for this step. Type into the address bar the address number you found in the last method, then press ↵ Enter. Doing so will take you to your router's Settings page. For some specialized routers, such as Google WiFi routers, you'll be prompted to download an app onto your smartphone and proceed using the phone app to configure your network. If you set a specific password for the settings page when you installed the router, you'll need to enter it to continue. Since each router's Settings page is different, this step will vary. Typically, you can either click the router's name, or click a Settings option to go to the general section of your router's settings. It may also be labeled "Network Name", "Wireless Network Name", "Router Name", or something similar. There will likely be a name already in the SSID field (e.g., "Belkin.be") that correlates with your network's current name. This should be the name you want to see while selecting your network from your computer's Wi-Fi menu. Click Apply, Save Settings, Save, or whatever your configuration screen uses to finalize the process. This will save your new network name.  In some cases, you may have to click an image of a floppy disc or a checkmark. Changing your router's settings will often cause the router to reboot.

Summary:
Open a web browser. Enter your router's address. Enter the password for your router if prompted. Select your router's current name. Look for the SSID field. Enter a new name for your wireless network. Save your new network name.