How do I know if my MTG card is rare?

Excuse me, I'm a bit confused about determining the rarity of my Magic: The Gathering (MTG) card. Could you please explain to me in simple terms how I can tell if a particular card is considered rare? Are there specific markings or identifiers I should be looking for? Also, does the edition or year of release play a role in determining rarity? I'd appreciate any guidance you could offer on this matter.