To make sure that your webcam is connected, you can follow these steps:

1. Check the physical connection: Make sure the webcam is properly plugged into your computer's USB port. If it's a built-in webcam, skip this step.

2. Check the device manager: On Windows, press the Windows key + X and select "Device Manager." On Mac, open "Finder," go to "Applications," then "Utilities," and select "System Information." Look for the webcam in the list of devices. If it's listed and there's no error message, the webcam is connected.

3. Install the driver: If the webcam is not listed in the device manager or there's an error message, you may need to install the driver for the webcam. Check the manufacturer's website for the latest driver and follow the instructions for installation.

4. Test the webcam: Once you have confirmed that the webcam is connected and the driver is installed, you can test it by using the built-in camera app on your computer or a third-party video-conferencing app.

If you're still having trouble, try unplugging the webcam and plugging it back in, or restarting your computer. If the issue persists, you may need to seek assistance from the manufacturer or a technical support specialist.