Ok, great, so we put Packet Filter in the title. Still doesn't explain it. So let's put Packet Filter for BSD in the title. You didn't explain what BSD is.

Eventually let's just put the entire article in the title.

> not knowing what PF stands for in the first place

I'm going to level you up 10x right now.

1. Select the text "Book of PF" in Chrome

2. Right click on it

3. Search with Google

4. Read the summary "OpenBSD's stateful packet filter, PF, is the heart of the OpenBSD firewall"

BOOM! You can now do this with anything you don't know! You no longer need to ask someone to explain everything to you!