I accidentally poked someone on facebook, what does it do/mean?

[Elaine]

I reacently got facebook and didn't know what poking was so I poked a ramdom to test it out. Does it signify someone... also what do I need to know for facebook?
OMG he liked my picture and I love him !!!!!!!!!!

[Andrew]

There are a number of reasons to send pokes, both to your friends and to those who aren't on your friends list, including:

Just to say a quick "hello"
To remind someone that you're waiting on a reply or message from him or her
To check in and see if a person has visited Facebook lately
To let someone know you're thinking of him or her
Just for fun

[D]

Big mistake.
Poking someone sends out a satellite signal to the main Facebook satellite, recently put into orbit in 2010, which alerts NASA who can then trace the location of the receiver of the poke, thus putting them on the world's most wanted list. So basically, poking that random person has put them in serious danger. Also, having an alert showing 'Blah blah has poked you' is pretty annoying...
Things to know about Facebook:
1. Don't poke people.

[Daniel]

Poke Is a Another Way of Saying Hello Or To Get Someones Attention its No Big Deal