If I understand correctly you’re using whit Widow autos? In this case, I would be hesitant to top too much as autos have a finite Veg period. With that said, Topping can be an effective method of bushing out your non-auto seed plants, and increase over all yield.
The idea is, the more tops, the bigger the yield.
By “Topping”, you turn one top into two. This idea can be expanded by something called “FIM” or “Fimming” (F* I missed).
“Supper cropping” is another method.
You also might want to check out LST (low stress training) method.
Good luck, and happy growing 