Allow the microphonePress the red button. Your browser will ask for permission to use the microphone: allow it to start recording.
Record and stopSpeak, then press the button again to stop. The bar shows the level: if it turns red, move away from the microphone to avoid distortion.
Listen to itListen to your recording before you save it. If you do not like it, press Record again.
DownloadDownload it as MP3 for a small file you can share, or as WAV if you will keep editing it.
For the best quality, record in a quiet room and keep the microphone about a hand's width from your mouth. The recording stays in your browser until you download it. If the microphone does not work, check that your browser has permission to use it in the site settings.