What is Network Security Key and is it important?

The system security secret is that the password, which enables one to authenticate your home/office network. It's a sort of network password/digital signature which you enters as an authority that lets you get admittance into a wireless network. Network-security keys also assist you to establish secure connections between your consumer requesting access and the system or connected wireless devices. This key also protects the system and its associated devices from any unauthorize undesirable access.