Many feel that the serious side of social networking exists at LinkedIn and, in fact, the site has been referred to by many as a business networking site instead of a social networking site. According to Jason Alba, author of I'm On LinkedIn, Now What???, "LinkedIn is a Web service where you can find others who you should connect with, so that they can add value to you, or you can add value to them, or just because adding each other to your networks seems to make a lot of sense. So it is a tool to expand your network, allowing your network to grow wider or deeper."