This article explains how to pair your laptop with a Bluetooth device. The steps may vary depending on the device.
Add a Bluetooth Device in Windows 10 | Pair a Bluetooth Device with Windows 10
There are many types of Bluetooth devices, and these steps are only relevant to some of them. Consult the device's user manual or manufacturer's website for specific instructions. For example, the steps to pair a Bluetooth surround sound system with a laptop are not the same as pairing headphones, which are not the same as pairing a smartphone.
Activate the Bluetooth function on the mobile device to make it discoverable or visible. If the device has a screen, look for Bluetooth in the Settings menu. Other devices have a dedicated button.
On your computer, go to the Bluetooth settings and choose to create a new connection or set up a new device. For example, in Windows, right-click the Bluetooth icon in the system tray or go to the Control Panel to find the Hardware and Sound > Devices and Printers page.