system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does putting chalk on my pool stick actually do? And is it stupid not to use it?
gpt
Chalk lets the cue tip have more friction when it comes in contact with the cue ball. The currently highest rated post is sort of incorrect. The chalk doesn't help at all when striking the cue ball in its center. But, the chalk helps enormously when hitting a cue ball above center (follow), below center (draw) or left or right (English). With no chalk you can miscue when hitting off center. Chalk helps when it's off center. 

Edit; change currently to formerly. Thanks for the up votes!