Vape explains it really good in the tooltips but pretty much blink allows you to fake lag, it will look like you're teleporting to other players. It also allows you to do some stuff that normally wouldn't happen with lag (like only choking outgoing packets).
Directions;
-Outgoing only: Only chokes outgoing packets (what you send to the server) but not what you receive, so you can still see other players moving around but to them it will look like you're frozen.
-Bi-directional: Chokes both outgoing and incoming packets, everyone else will freeze like you're lagging.
Type:
-All: Chokes all packets of all types (you wont be able to send anything like attack packets)
-Movement only: Only chokes movement related packets (you will still be able to send for example attack packets)
Breadcrumbs just show you where you came from, Spawn fake just shows you where your player is serverside. (they're both just visual)
Auto send automatically sends packets after the limit is reached, its basically just like disabling and enabling the module again.