What ruins GFCI outlet?

I'm curious to know, what factors commonly contribute to the malfunctioning or damage of a GFCI outlet? Could it be due to electrical overloads, faulty wiring, improper installation, or perhaps the age of the outlet itself? Are there any specific signs or symptoms that one should be aware of that indicate a GFCI outlet may be failing? Additionally, are there any preventative measures that homeowners can take to extend the life of their GFCI outlets and avoid potential issues? I'd appreciate any insights you could provide on this matter.