for me any of the up/downvote, click in to view, or boost counts.
I'm a scroller, but, like, if i see a joke in https://lemmy.world/c/dadjokes then i can chuckle and give it an upvote but i dont have to click in and load the thread fully. But the next time i load the page id lke to not have to scroll past that same thread to see new stuff.
If i downvote something id like to not see it again on the next load. If i open a thread and read the comment posts, i dont need to see that thread again on tne next load.
That sort of thing.
It does have some downsides in that finding threads i /sort-of/ remember and want to check again is harder, but i'm used to that.