To install a smart lock, follow these steps:

1.choose the right smart lock for your home: there are several types of smart locks available in the market, so choose the one that fits your needs and budget.

2.remove the existing deadbolt: use a screwdriver to remove the screws holding the deadbolt in place. keep the screws in a safe place as you might need them later.

3.install the lock: follow the manufacturer's instructions to install the smart lock into the door. usually, this involves attaching a mounting plate to the door with screws and then attaching the lock itself to the plate.

4.connect the lock to wi-fi: depending on the lock, you may need to connect it to wi-fi to operate it remotely. follow the manufacturer's instructions to connect the lock to your wi-fi network.

5.download the companion app: most smart locks come with a companion app that allows you to control the lock remotely. download the app from the app store or google play store, and follow the instructions to set it up.

6.test the lock: once the lock is installed and connected to wi-fi, test it out to make sure it's working properly. use the app to lock and unlock the door, and make sure the physical key still works in case of any problems with the lock. 

that's it! you've successfully installed a smart lock in your home.