Domain age is a factor in determining Google rankings, and a part of our SEO.
Sites are significantly devalued for the first few months after Google first discovers them. It is extremely challenging to rank well for competitive terms in those first few months. In fact, some SEO professionals simply won’t work with brand new domains.
According to Google’s Matt Cutts, the difference between a domain that’s 6 months old and 12 months old is very small.