There has been a lot of trouble for Yahoo users lately since they announced there was a breach of 1 billion Yahoo accounts in August 2013, and then in September released a statement that in 2014 an additional 500 million Yahoo accounts were breached. Yahoo has been urging their users to change their passwords and update their security.
If you have a Yahoo account, your account could potentially be at risk, and therefore it’s best to proactively change your password and update your security.