Ok, a lil hard to understand the question buddy but ill try. Ever heard of the goldilocks story, Well humidity and temperature are the goldilocks of growing.
60% humidity is optimal for veg and early flower.
High humidity leaves no room for new moisture vapor so the plants are unable transpire, to low and they transpire far to fast. Just try keep it round the 50 / 60 mark ( doesn't need to be exact, just not excessively high or low ).
You will only see benifits from modifying the humidity if your current levels are way to low or way to high.
People say too low and you invite pests, to high and you invite fungi or mold. They also say too low and your plants will dry too quick, too high and they will cook themselfs.
So the quick answer is yes it has advantages to increase or maintain humidity if your levels are currently in the real low or real high area, the advantage is normal growth.
I hope this helped buddy.