I found these information while I was surfing in the internet. Hope this will be helpful.
"A hardware wallet is a physical electronic device, built for the sole purpose of securing bitcoins.
The core innovation is that the hardware wallet must be connected to your computer, phone, or tablet before bitcoins may be spent.
Hardware wallets are a good choice if you’re serious about security and convenient, reliable Bitcoin storage.
Bitcoin hardware wallets keep private keys separate from vulnerable, internet-connected devices.
As bitcoins are digital, cyber-criminals could, potentially, target your computer’s “software wallet” and steal them by accessing your private key.
Generating and storing private keys offline using a hardware wallet ensures that hackers have no way to reach your bitcoins."