First off you should ask yourself these questions and you will understand the meaning of this important email.
This should make you think about a simple fact. Most of use the same password or some minor variation of that password on almost every site or service we use. This means that your digital footprint is spread all over the internet. On November 10, 2016 Yahoo admitted that some of its employees were aware of the theft of some 500,000,000 users’ data as early as 2014.
Is your Yahoo password the same password for your NetFlix account? Basically the internet has your password and someone bad knows it are you starting to see how this works?
The simplest thing you could do is to maintain a list of online account user id's and passwords. You need to make sure that you use a VERY COMPLICATED AND UNIQUE PASSWORD for each account. When you need to log into that site go to your master password list and use the UNIQUE password for that site. You never want to use the same password for different sites. It is also best practice to delete accounts that have not been used for 6 months or more.