Trying to Understand What the GRE Examination Is All About

Hey everyone, I’ve been hearing a lot about the GRE lately, especially from people planning to go abroad after college. I’m still figuring things out for myself, but can someone explain what is the GRE examination exactly? Like who can take it, what’s in the syllabus, and is it something we need to start preparing for early?

Would love some clarity :see_no_evil_monkey: