Usually echoes are caused by your microphone picking up the sound from your speakers. Most computers cancel this automatically, but only if you have your audio output and input set to the same device.
Otherwise, plug in a pair of headphones and the echo should disappear.In any case, we recommend using AI filtering software like Krisp.ai
or Nvidia Broadcast to clean up your background audio, even if you don't have an echo. It works like magic.