In my opinion, it was more important to win the Latino vote than to win that caucus.

[w4rma]

15. Nevada tends towards the older voter along all demographic lines. That favors Hillary.

But, as FiveThirtyEight noted, Nevada’s voters are mostly old. And the support of millennials and the Latino community wasn’t enough to edge out Clinton, who won the Nevada Democratic caucus with 52% of the vote.
http://qz.com/621302/sanders-may-have-lost-nevada-but-he-won-over-the-crucial-hispanic-vote/

As Nate Cohn points out, Nevada’s voters are fairly old — and no demographic trait has better predicted support for the Democratic candidates than the age of the voter, with younger Democrats flocking overwhelmingly to Sanders and older ones to Clinton. And maybe it’s Clinton who benefits from holding a caucus since Sanders relies on support from first-time voters who may not show up to vote at 11 a.m. on a Saturday morning.
http://fivethirtyeight.com/live-blog/nevada-caucus-south-carolina-primary-presidential-election-2016/