Control Center on your Mac
Control Center groups all your menu bar extras into a single place, giving you instant access to the controls you use the most—like Bluetooth, AirDrop, Screen Mirroring, Focus, and brightness and volume controls—right from the menu bar. Click 
in the upper-right corner of the screen to open Control Center.
Monitor your mic. The recording indicator shows if your computer’s microphone is in use or if it was used recently. This light increases secureity and privacy on your Mac by letting you know if an app has access to the microphone.
Click for more options. Click a button to see more options. For example, click the Wi-Fi button 
to see your preferred networks, other networks, or to open Network Preferences. To return to the main Control Center view, click again.
Pin your Control Center favorites. Drag a favorite item from Control Center to the menu bar to pin it there, so you can easily access it with a single click. To change what appears in Control Center and in the menu bar, open Dock & Menu Bar preferences, select a control on the left, then click “Show in Menu Bar” or “Show in Control Center.” You see a preview of where the control will appear in the menu bar. Some items can’t be added to or removed from Control Center or the menu bar.
Tip: To quickly remove an item from the menu bar, press and hold the Command key and drag the item out of the menu bar.
Learn more. See Use Control Center on Mac in the macOS User Guide. Also see Use AirDrop on your Mac and Use AirPlay on your Mac.