What is the origin of the idiom "silver surfer" and when to use it?

The idiom "silver surfer" originated in the late 20th century and combines the words "silver," referring to gray or white hair associated with age, and "surfer," originally denoting someone who rides waves on a surfboard. It describes older individuals who are tech-savvy and actively use the Internet, particularly for browsing and online activities. It is often used to refer to older individuals who are comfortable with technology despite not growing up with it, and who actively engage in online activities.