What is the most logical next event?

How to start getting traffic to your website via facebook groups in few hours
Create a group on facebook.
Go to the group home page.
Choose the option' invite people to join '
Choose the option' import email addresses '
Choose the option' upload a contact file '
Start working on adding contacts.
Now, you might have limited contacts in your email id or in a file say 500. But, this is not a sufficient amount, if you send invitation to 500 people then only 1-2 will join your group.