What does it mean? Your baby is more active now?

Melisa
I keep getting told that the baby should be more active now. ( almost 30 wks) I feel my baby at different times through the day but not all day long. I usually get movements when I'm sitting and resting but there is still a lot of time I don't feel much. I assume he is sleeping is this normal or should he be more active throughout the day even when I'm active?