A 2014 Pew Research Center survey says these things about millennials ages 18 to 33:

They're low on social trust—that is, they're not as trusting of strangers or institutions as earlier generations are. The other side of that coin is that friends are very important to them.
They're racially diverse.
They have more debt thanks to higher student loans and lower income and wealth thanks to unemployment.
They're educated—more millennials than previous generations are college educated.
They're "digital natives"—that is, people who never had to adapt to major innovations in digital technology such as the rest of us born in pre-Internet or pre-smartphone days.

But on the other hand, a Transamerica Retirement Center report, also in 2014, says this about millennials:

Seventy percent of Millennials are already saving for retirement and started saving at the unprecedented young age of 22 (median).
Despite the confidence-shaking events of the Great Recession, Millennials' household retirement savings dramatically increased from $9,000 in 2007 to $32,000 in 2014 (estimated medians).
Three out of four (76 percent) say that retirement benefits offered by a prospective employer will be a major factor in their decision on whether to accept a future job offer.

The simplest conclusion many reach is to latch onto technology to meet millennials' needs.

Instant Insights /

Millennials: How to appeal to the retirees of tomorrow