Select a participant in the meeting to mute, pin, or remove that person.
Note: For education accounts, only the meeting creator, Google Calendar event owner, or the person who set up the meeting on a hardware device in the room can mute or remove video meeting participants.
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Pin participants to the Top of the Google Meet list
Click Pin in participant thumbnails to pin them to the top of the list.
Remove a Google Meet participant
A participant from the domain that hosted the video meeting can remove other participants, if necessary.
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During the video meeting, click the Back arrow 
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Mute a Google Meet participant’s microphone
If you experience feedback or background noise during a video meeting, you may want to mute the other person’s microphone.
To mute someone, next to the person’s thumbnail, hover over their volume icon and click Mute
Advice
- For privacy reasons, you cannot unmute others. Ask participants to unmute their audio.
- To mute or unmute, at the bottom of the video window, click Mute
Android
Select a participant in the meeting to mute, pin, or remove that person.
Note: For education accounts, only the meeting creator, Google Calendar event owner, or the person who set up the meeting on a hardware device in the room can mute or remove video meeting participants.
See more:
How to join a video meeting on Google Meet
How to view meeting details and attachments in Google Meet
Landscape mode in Google Meet
Rotate your device to landscape mode, tap the participant’s image and tap Pin to pin that person to the top of the list.
Remove a Google Meet participant
A participant from the domain that hosted the video meeting can remove other participants, if necessary.
During a video meeting, tap the tab Peopletap the person’s name and tap Remove
You can also rotate your phone to landscape mode, swipe to scroll through the list, tap the person’s icon, and tap Remove 
Mute a Google Meet participant’s microphone
If you experience feedback or background noise during a video meeting, you may want to mute the other person’s microphone.
To mute others, on the tab Peopleselect the person and press Mute
You can also rotate your phone to landscape mode, swipe to scroll through the list, tap the person’s icon, and tap Mute
Advice
- For privacy reasons, you cannot unmute others. Ask participants to unmute their audio.
- To mute or unmute, tap Mute
iPhone & iPad
Select a participant in the meeting to mute, pin, or remove that person.
Note: For education accounts, only the meeting creator, Google Calendar event owner, or the person who set up the meeting on a hardware device in the room can mute or remove video meeting participants.
Landscape mode in Google Meet
Rotate your iPhone to landscape mode and tap a participant’s image to see additional controls, like Mute or Delete
Swipe your image up or down to hide or show the thumbnail (filmstrip) or to move the movie clip across your screen.
Swipe the other person’s picture up or down to scroll through the list of participants.
Remove a Google Meet participant
A participant from the domain that hosted the video meeting can remove other participants, if necessary.
During a video meeting, tap the tab Peopletap the person’s name and tap Remove
You can also rotate your phone to landscape mode, swipe to scroll through the list, tap the person’s icon, and tap Remove
Mute a Google Meet participant’s microphone
If you experience feedback or background noise during a video meeting, you may want to mute the other person’s microphone.
To mute others, on the tab Peopleselect the person and press Mute
You can also rotate your phone to landscape mode, swipe to scroll through the list, tap the person’s icon, and tap Mute
Advice
- For privacy reasons, you cannot unmute others. Ask participants to unmute their audio.
- To mute or unmute, tap Mute
How to use the full Google Meet
Source: Instructions on how to pin, mute or remove people from a video meeting on Google Meet
– TechtipsnReview
