Facebook is a networking site that helps people to communicate easily with each other. This site also provides new comers to find a lot of friends (new and old who are connected to facebook) easily.
after joining the facebook and having an account now you can find any person who is connected to facebook. Just type his/her name in search box and see results.
You can also share any thing which you like. When you have opened the page which you like to share with others just click share and that page will be sent to all your friend wall.(wall is the main page of every facebook account)