system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is this house spider doing?

Currently pulling an all nighter for work, and this spider bro is just crawling around the same area. It's been going on for like 30 minutes now, just crawling around the same 5 foot diameter area on my wall, is he exploring the paintings I have hung up? What's this lil dude doing? Also what can I feed him, he looks a lil hungry.
gpt
it could be nesting behavior, it could have a disease or parasite, it might just be too simple minded to cope with the human-made environment it's found itself in. 

unless you live in australia or particular parts of africa, your spider bro probably eats smaller insects. house flies, crickets, etc. though, if you really want to take care of this thing, your best bet is most likely to move him outside, preferably to a bush or shrub.