On the sicial tab there is an image of a present followed by two boxes, so far I have only seen the far right one marked. This lets me know I have gifted them for the day I assume, what is the other box for, or does it mean if you get a mark on the right they hated it it and on the left they liked it, something like that? tl;dr what do the boxes mean to the right of the gift image?
You can give two gifts to a villager each week. The checkboxes just remind you of how many times you've gifted that person that week.