In IT industry Offshore and onshore software development term is quite popular. I have some idea about both term but want to know more about offshore & onshore software development advantage. which process is more beneficial to a IT company.   

Offshore and Onshore are outsourcing services that deal with software development. The difference between them is that when you say "offshore", it means overseas. So if you avail of offshore software outsourcing, you are outsourcing software development to a different country. When you say onshore software outsourcing, it is still outsourcing but the company you outsourced the software development is within your country.