Agrippina didn't achieve much in the way that the emperors had, but you write about what were her achievements, so loooking at the power she gained, the way she paved the way for Nero to become emperor.
Her two most important ambitions were to have her son on the throne and then to beomc ethe most pwoerful and influential woman in rome.
Some ofher achievements included
-surviving the rule of caligula
- first openly powerful, political woman in rome- even working in a sort of patnership with Claudius. She oversaw balanced and consistent policies, reorganised the governemtn, advised on foreign policy, appointed praetorian officers and prefects- notably burrus-
- Used nero on hte throne to rule
-Intervened successfully in Judea (Josephus). Sat on the tribunal over britons in the AD 51 and was given equal honour with claudus. She was also bvery influential in the provinces, appearing on their coins etc.
- Married her uncle
She could not maintain her power as she lost control over nero. AS a result of her life and demise no other, subsequent imperial woman tried to imitate Agrippina