LocalBitcoins.com is a person-to-person bitcoin trading site.
At LocalBitcoins.com, people from different countries can exchange their local currency to bitcoins. The site allows users to post advertisements where they state exchange rate and payment methods for buying or selling bitcoins.
You reply to these advertisements and agree to meet the person to buy bitcoins with cash, or trade directly with online banking. Bitcoins are placed in LocalBitcoins.com web wallet from where you can pay your bitcoin purchases directly.