SSL (Secure Sockets Layer) is digital certificate for domain name is issued by central authority i.e certificate authority. You can purchase this certificate after that you have to pass through Certificate Authority’s verification process then only you will eligible for SSL certificate .
SSL works on the fact that encrypted algorithm scramble data transitically which make transferred data between two browsers, systems or website impossible to read due to which hacker is not able to hack your data.
SSL (Secure Sockets Layer) is security technology necessary to ensure an encrypted connection between server and browser and authenticates identity of website.