Damn pests

today i went to checkout my plant growth and was dissapointed to find out that some bugs or slugs or something had taken a few bites out of some of the leaves and my question is does this kill the leaves onces someting has took a bite out of it or will grow back basically what becomes of the leave after this has happened

Losing a couple leaves here and there won't kill your plant. You want to make sure they don't continue feeding on them and set up camp. Look into one of the organic insecticides if you are in flowering. If you are still in veg, there are numerous options. Good luck.

use slug pellets and a allround bugkiller give them a chance and they'll strip your plants in no time

if there small use a milk jug and put it over ur plant it will make a green house and keep the bugs out