The digital age currently has significant influence on adolescent development in determining identity. Today many teenagers are stalled in bad behavior due to technological advances, especially in the use of online media. However, parents are not very responsive to the impact of online media, so that it may have impact to the quality of their generation in the future, especially the readiness to face the demographic bonus of 2020-2030. The purpose of this study is to describe adolescents in the digital era in Jambi City, their level of knowledge, attitudes, parental behavior and the development of adolescent behavior in the digital era to welcome demographic bonuses in Jambi City. Also, it is hoped to describe how to control the negative impact of the digital age on them and the influence of knowledge (education) levels, parents' attitudes and behavior towards the development of adolescents in the digital era. The results of this study show that teenagers in the digital age have not been able to utilize online media to improve their knowledge and achievements. Knowledge of parents in Jambi City is in the poor category but their attitude is in a fairly good category. The behavior of parents in Jambi City is in the good category. However, the development of adolescent behavior from the perceptions of parents in the cognitive dimension is in the poor category, while their personal and social development is in a fairly good category. Statistical results indicated that knowledge, attitudes and behavior of parents simultaneously and partially have significant effect on the development of adolescent behavior in the city of Jambi. Knowledge of parents is the dominant variable towards development of adolescent behavior