If you want a denser yield vs. More airey wispy buds then yes lollypopping or trimming off all the small scraggley stuff on the bottom of your girls and the bottom of you branches. This allows for plant energy that was going to the trimmed off, to the canopy and buds. Thinning, trimming, pruning also allows for more light to get thru the canoy and to be more evenly distrubuted. Allowing for denser buds. This should be done a minimum of 10-14 days before flower. This allows for repair time, so after that the plant energy can be used for bud prodeiction rather then repair. If you plan on taking clones this is the perfect time to do so! Instead of throwing out your trim and branches, simply cut them for clones. If your looking to increase yield, one of the best ways is topping! Topping is the act of cutting off the main cola so that it splits into 2 or more tcolas usually a max of 8 colas. This allows the auxin to be distributed amoungst the enitre plant, rather then just the top cola. Some strains don't even reach their bud thresh hold, unless they are topped for example blueberry. But for others instead of making multiple large colas, the total bud mass that the mail cola would have been will just be evenly distributed amongst the total colas. And again save the tops and turn them into new strong clones! Another way is to add some blue light into your grow when flowering. Mix up some MH and HPS..ad a strip light shining up from the bottom and your HPS shining down. The HPS (red light) will encourage floral/ bud growth, while the MH/stip light (blue light) will encourage denser nugs and stronger thicker stalk to hold that dense buds!