Bitcoin address is a unique identifier that serve as virtual location where crptocurrency can sent.
           It is a long 27-34 string of alphanumeric that acts similarly to an email address or username in any social network. These are also utilized to timestamp and record each and every transaction in the Blockchain.

It can denote one single individual, a group of persons, or any organization depending on their team spirit and level of security maintained.
        So therefore It is advisable to use a new address every time of transaction.