What is credential stuffing? Why you need unique passwords

One of the most serious Internet security risks involves usernames and passwords–and the reuse of passwords across multiple sites. The best practice is to use a different password on every website or with every service where you have an account. While it’s okay to reuse the same user name (which is sometimes your email address), passwords should always be unique because of data breaches and credential stuffing.

Read the rest of the article on The Mac Security Blog.