What does "perky" mean?

if you are putting on a more sociallizing part, it turns a little more perky and happy.

looking bright and well 

I c,once i get someting what i want to get ,i will feel perky at that time, but the perky can not keep long time ,just short time,i will feel downbeat,so i always like chasing myself to reach new goal after get success ,i  like challenge and i like use my ability.

i feel perky after coffee)