The result of a successful or failed saving throw is detailed in the effect that allows the save. Usually, a successful save means that a creature suffers no harm, or reduced harm, from an effect.
Saving Throw. A saving throw represents an attempt to resist a spell, a trap, a poison, a disease, or a similar risk of harm.
You have success when:
Saving Throw ≥ DC for Saving Throw
2. Add your ability modifier. The cause of the saving throw determines which ability applies.
3. Add your proficiency bonus if you are proficient in the saving throw.
4. Add any other applicable modifier.