* If tomatometer & audience score are within 5% of each other, you can trust the ratings to give you a decent indiciation of movie quality.
* If tomatometer is more than 15%+ higher than audience score, it means it's an artsy fartsy movie that critics like and movies don't.
* If audience score is 15%+ higher than tomatometer, it's a fun movie even if it's not oscar worthy. (https://www.rottentomatoes.com/m/old_school is a perfect example)
* Tomatometer ≫ Audience, there is artificial bias on the critics side, perhaps due to political reasons, or perhaps due social conforming by film critics within a clique, or reviews are being paid for by the film industry.
* Tomatometer ≪ Audience, probably more fun, or less serious film, or may have politically confronting themes that critics don't like to praise.
* Tomatometer ≈ Audience, rating is probably a good indicator of film quality.