Andrew Garfield talks astrology—is his sun/moon sign theory legit?

I saw a video of Andrew Garfield talking to an interviewer (don’t know her name). He asked about her sun sign, and she said Aquarius. He then mentioned that his moon sign is also Aquarius, which caught my attention because it’s the first time I’ve seen a celebrity talk about astrology so casually.

He said, "If your sun sign is the same as someone’s moon sign, it’s good." Is that true, or just a flirtatious line?

I’m new to astrology and still figuring out terms like “placements,” “moon signs,” and “rising signs.”

Are there any other common astrology beliefs (like the one Andrew shared) that you've found to be true?